blocks|key|1484307|text|我使用System.Web.HttpUtility.JavaScriptStringEncode|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1484308|string+quoted+=+HttpUtility.JavaScriptStringEncode(input);|code-block|syntax|javascript|1484309|entityMap|0|LINK|mutability|MUTABLE|url|https://msdn.microsoft.com/en-us/library/system.web.httputility.javascriptstringencode(v=vs.110).aspx^0|3|19|3|19|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

I use <a href="https://msdn.microsoft.com/en-us/library/system.web.httputility.javascriptstringencode(v=vs.110).aspx" rel="noreferrer"><code>System.Web.HttpUtility.JavaScriptStringEncode</code></a>

<pre><code>string quoted = HttpUtility.JavaScriptStringEncode(input);
</code></pre>

blocks|key|1484282|text|对于那些使用来自Newtonsoft的非常流行的Json.Net项目的人来说，这项任务是微不足道的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1484283|using+Newtonsoft.Json;

....
var+s+=+JsonConvert.ToString(@"a\b");
Console.WriteLine(s);
....|code-block|syntax|javascript|1484284|此代码打印如下：|1484285|"a\b“|1484286|也就是说，结果字符串值包含引号和转义的反斜杠。|1484287|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

For those using the very popular Json.Net project from Newtonsoft the task is trivial:

<pre><code>using Newtonsoft.Json;

....
var s = JsonConvert.ToString(@"a\b");
Console.WriteLine(s);
....
</code></pre>

This code prints:

"a\\b"

That is, the resulting string value contains the quotes as well as the escaped backslash.

blocks|key|1269638|text|在the+answer+by+Dejan上构建，您可以做的是import+System.Web.Helpers+.NET+Framework+assembly，然后使用以下函数：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1269639|static+string+EscapeForJson(string+s)+{
++string+quoted+=+System.Web.Helpers.Json.Encode(s);
++return+quoted.Substring(1,+quoted.Length+-+2);
}|code-block|syntax|javascript|1269640|因为Encode会自动用双引号将字符串括起来，所以Substring调用是必需的。|1269641|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/20935885/974531|1|https://stackoverflow.com/a/14380681/974531|2|http://msdn.microsoft.com/en-us/library/system.web.helpers.json.encode%2528v=vs.111%2529.aspx|3|http://msdn.microsoft.com/en-us/library/aka44szs%2528v=vs.110%2529.aspx^0|11|I|1|J|0|U|1D|1|0|0|2|6|P|9|2|6|2|P|9|3|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@$9|13|A|14|1|15]|$9|16|A|17|1|18]]|E|$]]|$1|F|3|G|5|H|7|19|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1A|8|@$9|1B|A|1C|B|C]|$9|1D|A|1E|B|C]]|D|@$9|1F|A|1G|1|1H]|$9|1I|A|1J|1|1K]]|E|$]]|$1|M|3|-4|5|6|7|1L|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]|U|$5|P|Q|R|E|$S|V]]|W|$5|P|Q|R|E|$S|X]]|Y|$5|P|Q|R|E|$S|Z]]]]

Building on <a href="https://stackoverflow.com/a/20935885/974531">the answer by Dejan</a>, what you can do is <a href="https://stackoverflow.com/a/14380681/974531">import <code>System.Web.Helpers</code> .NET Framework assembly</a>, then use the following function:

 <pre class="lang-csharp prettyprint-override"><code>static string EscapeForJson(string s) {
 string quoted = System.Web.Helpers.Json.Encode(s);
 return quoted.Substring(1, quoted.Length - 2);
}
</code></pre>

The <a href="http://msdn.microsoft.com/en-us/library/aka44szs%28v=vs.110%29.aspx" rel="noreferrer"><code>Substring</code></a> call is required, since <a href="http://msdn.microsoft.com/en-us/library/system.web.helpers.json.encode%28v=vs.111%29.aspx" rel="noreferrer"><code>Encode</code></a> automatically surrounds strings with double quotes.

blocks|key|1269460|text|是的，只需将以下函数添加到您的Utils类中即可：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1269461|++++public+static+string+cleanForJSON(string+s)
++++{
++++++++if+(s+==+null+%7C%7C+s.Length+==+0)+{
++++++++++++return+"";
++++++++}

++++++++char+++++++++c+=+'\0';
++++++++int++++++++++i;
++++++++int++++++++++len+=+s.Length;
++++++++StringBuilder+sb+=+new+StringBuilder(len+%2B+4);
++++++++String+++++++t;

++++++++for+(i+=+0;+i+<+len;+i+%2B=+1)+{
++++++++++++c+=+s[i];
++++++++++++switch+(c)+{
++++++++++++++++case+'\\':
++++++++++++++++case+'"':
++++++++++++++++++++sb.Append('\\');
++++++++++++++++++++sb.Append(c);
++++++++++++++++++++break;
++++++++++++++++case+'/':
++++++++++++++++++++sb.Append('\\');
++++++++++++++++++++sb.Append(c);
++++++++++++++++++++break;
++++++++++++++++case+'\b':
++++++++++++++++++++sb.Append("\\b");
++++++++++++++++++++break;
++++++++++++++++case+'\t':
++++++++++++++++++++sb.Append("\\t");
++++++++++++++++++++break;
++++++++++++++++case+'\n':
++++++++++++++++++++sb.Append("\\n");
++++++++++++++++++++break;
++++++++++++++++case+'\f':
++++++++++++++++++++sb.Append("\\f");
++++++++++++++++++++break;
++++++++++++++++case+'\r':
++++++++++++++++++++sb.Append("\\r");
++++++++++++++++++++break;
++++++++++++++++default:
++++++++++++++++++++if+(c+<+'+')+{
++++++++++++++++++++++++t+=+"000"+%2B+String.Format("X",+c);
++++++++++++++++++++++++sb.Append("\\u"+%2B+t.Substring(t.Length+-+4));
++++++++++++++++++++}+else+{
++++++++++++++++++++++++sb.Append(c);
++++++++++++++++++++}
++++++++++++++++++++break;
++++++++++++}
++++++++}
++++++++return+sb.ToString();
++++}|code-block|syntax|javascript|1269462|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Yep, just add the following function to your Utils class or something:

<pre><code> public static string cleanForJSON(string s)
 {
 if (s == null || s.Length == 0) {
 return "";
 }

 char c = '\0';
 int i;
 int len = s.Length;
 StringBuilder sb = new StringBuilder(len + 4);
 String t;

 for (i = 0; i &lt; len; i += 1) {
 c = s[i];
 switch (c) {
 case '\\':
 case '"':
 sb.Append('\\');
 sb.Append(c);
 break;
 case '/':
 sb.Append('\\');
 sb.Append(c);
 break;
 case '\b':
 sb.Append("\\b");
 break;
 case '\t':
 sb.Append("\\t");
 break;
 case '\n':
 sb.Append("\\n");
 break;
 case '\f':
 sb.Append("\\f");
 break;
 case '\r':
 sb.Append("\\r");
 break;
 default:
 if (c &lt; ' ') {
 t = "000" + String.Format("X", c);
 sb.Append("\\u" + t.Substring(t.Length - 4));
 } else {
 sb.Append(c);
 }
 break;
 }
 }
 return sb.ToString();
 }
</code></pre>

blocks|key|1484084|text|我使用了以下代码来转义json的字符串值。您需要将'"‘添加到以下代码的输出中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1484085|public+static+string+EscapeStringValue(string+value)
{
++++const+char+BACK_SLASH+=+'\\';
++++const+char+SLASH+=+'/';
++++const+char+DBL_QUOTE+=+'"';

++++var+output+=+new+StringBuilder(value.Length);
++++foreach+(char+c+in+value)
++++{
++++++++switch+(c)
++++++++{
++++++++++++case+SLASH:
++++++++++++++++output.AppendFormat("{0}{1}",+BACK_SLASH,+SLASH);
++++++++++++++++break;

++++++++++++case+BACK_SLASH:
++++++++++++++++output.AppendFormat("{0}{0}",+BACK_SLASH);
++++++++++++++++break;

++++++++++++case+DBL_QUOTE:
++++++++++++++++output.AppendFormat("{0}{1}",BACK_SLASH,DBL_QUOTE);
++++++++++++++++break;

++++++++++++default:
++++++++++++++++output.Append(c);
++++++++++++++++break;
++++++++}
++++}

++++return+output.ToString();
}|code-block|syntax|javascript|1484086|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I have used following code to escape the string value for json.
You need to add your '"' to the output of the following code:

<pre><code>public static string EscapeStringValue(string value)
{
 const char BACK_SLASH = '\\';
 const char SLASH = '/';
 const char DBL_QUOTE = '"';

 var output = new StringBuilder(value.Length);
 foreach (char c in value)
 {
 switch (c)
 {
 case SLASH:
 output.AppendFormat("{0}{1}", BACK_SLASH, SLASH);
 break;

 case BACK_SLASH:
 output.AppendFormat("{0}{0}", BACK_SLASH);
 break;

 case DBL_QUOTE:
 output.AppendFormat("{0}{1}",BACK_SLASH,DBL_QUOTE);
 break;

 default:
 output.Append(c);
 break;
 }
 }

 return output.ToString();
}
</code></pre>

blocks|key|1484561|text|在.Net核心3%2B和.Net+5%2B中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1484562|string+escapedJsonString+=+JsonEncodedText.Encode(jsonString);|code-block|syntax|javascript|1484563|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In .Net Core 3+ and .Net 5+:
<pre><code>string escapedJsonString = JsonEncodedText.Encode(jsonString);
</code></pre>

blocks|key|1484460|text|这里提供的方法是错误的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1484461|既然可以使用System.Web.HttpUtility.JavaScriptEncode，为什么还要冒险走那么远呢？|1484462|如果你在一个较低的框架上，你可以直接从mono复制粘贴它|1484463|由mono-project+@+https://github.com/mono/mono/blob/master/mcs/class/System.Web/System.Web/HttpUtility.cs提供|offset|length|1484464|++++public+static+string+JavaScriptStringEncode(string+value,+bool+addDoubleQuotes)
++++{
++++++++if+(string.IsNullOrEmpty(value))
++++++++++++return+addDoubleQuotes+?+"\"\""+:+string.Empty;

++++++++int+len+=+value.Length;
++++++++bool+needEncode+=+false;
++++++++char+c;
++++++++for+(int+i+=+0;+i+<+len;+i%2B%2B)
++++++++{
++++++++++++c+=+value[i];

++++++++++++if+(c+>=+0+&&+c+<=+31+%7C%7C+c+==+34+%7C%7C+c+==+39+%7C%7C+c+==+60+%7C%7C+c+==+62+%7C%7C+c+==+92)
++++++++++++{
++++++++++++++++needEncode+=+true;
++++++++++++++++break;
++++++++++++}
++++++++}

++++++++if+(!needEncode)
++++++++++++return+addDoubleQuotes+?+"\""+%2B+value+%2B+"\""+:+value;

++++++++var+sb+=+new+System.Text.StringBuilder();
++++++++if+(addDoubleQuotes)
++++++++++++sb.Append('"');

++++++++for+(int+i+=+0;+i+<+len;+i%2B%2B)
++++++++{
++++++++++++c+=+value[i];
++++++++++++if+(c+>=+0+&&+c+<=+7+%7C%7C+c+==+11+%7C%7C+c+>=+14+&&+c+<=+31+%7C%7C+c+==+39+%7C%7C+c+==+60+%7C%7C+c+==+62)
++++++++++++++++sb.AppendFormat("\\u{0:x4}",+(int)c);
++++++++++++else+switch+((int)c)
++++++++++++++++{
++++++++++++++++++++case+8:
++++++++++++++++++++++++sb.Append("\\b");
++++++++++++++++++++++++break;

++++++++++++++++++++case+9:
++++++++++++++++++++++++sb.Append("\\t");
++++++++++++++++++++++++break;

++++++++++++++++++++case+10:
++++++++++++++++++++++++sb.Append("\\n");
++++++++++++++++++++++++break;

++++++++++++++++++++case+12:
++++++++++++++++++++++++sb.Append("\\f");
++++++++++++++++++++++++break;

++++++++++++++++++++case+13:
++++++++++++++++++++++++sb.Append("\\r");
++++++++++++++++++++++++break;

++++++++++++++++++++case+34:
++++++++++++++++++++++++sb.Append("\\\"");
++++++++++++++++++++++++break;

++++++++++++++++++++case+92:
++++++++++++++++++++++++sb.Append("\\\\");
++++++++++++++++++++++++break;

++++++++++++++++++++default:
++++++++++++++++++++++++sb.Append(c);
++++++++++++++++++++++++break;
++++++++++++++++}
++++++++}

++++++++if+(addDoubleQuotes)
++++++++++++sb.Append('"');

++++++++return+sb.ToString();
++++}|code-block|syntax|javascript|1484465|这可以压缩为|1484466|//+https://github.com/mono/mono/blob/master/mcs/class/System.Json/System.Json/JsonValue.cs
public+class+SimpleJSON
{

++++private+static++bool+NeedEscape(string+src,+int+i)
++++{
++++++++char+c+=+src[i];
++++++++return+c+<+32+%7C%7C+c+==+'"'+%7C%7C+c+==+'\\'
++++++++++++//+Broken+lead+surrogate
++++++++++++%7C%7C+(c+>=+'\uD800'+&&+c+<=+'\uDBFF'+&&
++++++++++++++++(i+==+src.Length+-+1+%7C%7C+src[i+%2B+1]+<+'\uDC00'+%7C%7C+src[i+%2B+1]+>+'\uDFFF'))
++++++++++++//+Broken+tail+surrogate
++++++++++++%7C%7C+(c+>=+'\uDC00'+&&+c+<=+'\uDFFF'+&&
++++++++++++++++(i+==+0+%7C%7C+src[i+-+1]+<+'\uD800'+%7C%7C+src[i+-+1]+>+'\uDBFF'))
++++++++++++//+To+produce+valid+JavaScript
++++++++++++%7C%7C+c+==+'\u2028'+%7C%7C+c+==+'\u2029'
++++++++++++//+Escape+"</"+for+<script>+tags
++++++++++++%7C%7C+(c+==+'/'+&&+i+>+0+&&+src[i+-+1]+==+'<');
++++}



++++public+static+string+EscapeString(string+src)
++++{
++++++++System.Text.StringBuilder+sb+=+new+System.Text.StringBuilder();

++++++++int+start+=+0;
++++++++for+(int+i+=+0;+i+<+src.Length;+i%2B%2B)
++++++++++++if+(NeedEscape(src,+i))
++++++++++++{
++++++++++++++++sb.Append(src,+start,+i+-+start);
++++++++++++++++switch+(src[i])
++++++++++++++++{
++++++++++++++++++++case+'\b':+sb.Append("\\b");+break;
++++++++++++++++++++case+'\f':+sb.Append("\\f");+break;
++++++++++++++++++++case+'\n':+sb.Append("\\n");+break;
++++++++++++++++++++case+'\r':+sb.Append("\\r");+break;
++++++++++++++++++++case+'\t':+sb.Append("\\t");+break;
++++++++++++++++++++case+'\"':+sb.Append("\\\"");+break;
++++++++++++++++++++case+'\\':+sb.Append("\\\\");+break;
++++++++++++++++++++case+'/':+sb.Append("\\/");+break;
++++++++++++++++++++default:
++++++++++++++++++++++++sb.Append("\\u");
++++++++++++++++++++++++sb.Append(((int)src[i]).ToString("x04"));
++++++++++++++++++++++++break;
++++++++++++++++}
++++++++++++++++start+=+i+%2B+1;
++++++++++++}
++++++++sb.Append(src,+start,+src.Length+-+start);
++++++++return+sb.ToString();
++++}
}|1484467|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/mono/mono/blob/master/mcs/class/System.Web/System.Web/HttpUtility.cs^0|0|0|0|G|2F|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|12|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|13|8|@]|9|@$H|14|I|15|1|16]]|A|$]]|$1|J|3|K|5|L|7|17|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|18|8|@]|9|@]|A|$]]|$1|Q|3|R|5|L|7|19|8|@]|9|@]|A|$M|N]]|$1|S|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z]]]]

The methods offered here are faulty. 
Why venture that far when you could just use System.Web.HttpUtility.JavaScriptEncode ?
If you're on a lower framework, you can just copy paste it from mono
Courtesy of the mono-project @
<a href="https://github.com/mono/mono/blob/master/mcs/class/System.Web/System.Web/HttpUtility.cs" rel="nofollow noreferrer">https://github.com/mono/mono/blob/master/mcs/class/System.Web/System.Web/HttpUtility.cs</a>
<pre><code> public static string JavaScriptStringEncode(string value, bool addDoubleQuotes)
 {
 if (string.IsNullOrEmpty(value))
 return addDoubleQuotes ? &quot;\&quot;\&quot;&quot; : string.Empty;

 int len = value.Length;
 bool needEncode = false;
 char c;
 for (int i = 0; i &lt; len; i++)
 {
 c = value[i];

 if (c &gt;= 0 &amp;&amp; c &lt;= 31 || c == 34 || c == 39 || c == 60 || c == 62 || c == 92)
 {
 needEncode = true;
 break;
 }
 }

 if (!needEncode)
 return addDoubleQuotes ? &quot;\&quot;&quot; + value + &quot;\&quot;&quot; : value;

 var sb = new System.Text.StringBuilder();
 if (addDoubleQuotes)
 sb.Append('&quot;');

 for (int i = 0; i &lt; len; i++)
 {
 c = value[i];
 if (c &gt;= 0 &amp;&amp; c &lt;= 7 || c == 11 || c &gt;= 14 &amp;&amp; c &lt;= 31 || c == 39 || c == 60 || c == 62)
 sb.AppendFormat(&quot;\\u{0:x4}&quot;, (int)c);
 else switch ((int)c)
 {
 case 8:
 sb.Append(&quot;\\b&quot;);
 break;

 case 9:
 sb.Append(&quot;\\t&quot;);
 break;

 case 10:
 sb.Append(&quot;\\n&quot;);
 break;

 case 12:
 sb.Append(&quot;\\f&quot;);
 break;

 case 13:
 sb.Append(&quot;\\r&quot;);
 break;

 case 34:
 sb.Append(&quot;\\\&quot;&quot;);
 break;

 case 92:
 sb.Append(&quot;\\\\&quot;);
 break;

 default:
 sb.Append(c);
 break;
 }
 }

 if (addDoubleQuotes)
 sb.Append('&quot;');

 return sb.ToString();
 }
</code></pre>
This can be compacted into
<pre><code>// https://github.com/mono/mono/blob/master/mcs/class/System.Json/System.Json/JsonValue.cs
public class SimpleJSON
{

 private static bool NeedEscape(string src, int i)
 {
 char c = src[i];
 return c &lt; 32 || c == '&quot;' || c == '\\'
 // Broken lead surrogate
 || (c &gt;= '\uD800' &amp;&amp; c &lt;= '\uDBFF' &amp;&amp;
 (i == src.Length - 1 || src[i + 1] &lt; '\uDC00' || src[i + 1] &gt; '\uDFFF'))
 // Broken tail surrogate
 || (c &gt;= '\uDC00' &amp;&amp; c &lt;= '\uDFFF' &amp;&amp;
 (i == 0 || src[i - 1] &lt; '\uD800' || src[i - 1] &gt; '\uDBFF'))
 // To produce valid JavaScript
 || c == '\u2028' || c == '\u2029'
 // Escape &quot;&lt;/&quot; for &lt;script&gt; tags
 || (c == '/' &amp;&amp; i &gt; 0 &amp;&amp; src[i - 1] == '&lt;');
 }



 public static string EscapeString(string src)
 {
 System.Text.StringBuilder sb = new System.Text.StringBuilder();

 int start = 0;
 for (int i = 0; i &lt; src.Length; i++)
 if (NeedEscape(src, i))
 {
 sb.Append(src, start, i - start);
 switch (src[i])
 {
 case '\b': sb.Append(&quot;\\b&quot;); break;
 case '\f': sb.Append(&quot;\\f&quot;); break;
 case '\n': sb.Append(&quot;\\n&quot;); break;
 case '\r': sb.Append(&quot;\\r&quot;); break;
 case '\t': sb.Append(&quot;\\t&quot;); break;
 case '\&quot;': sb.Append(&quot;\\\&quot;&quot;); break;
 case '\\': sb.Append(&quot;\\\\&quot;); break;
 case '/': sb.Append(&quot;\\/&quot;); break;
 default:
 sb.Append(&quot;\\u&quot;);
 sb.Append(((int)src[i]).ToString(&quot;x04&quot;));
 break;
 }
 start = i + 1;
 }
 sb.Append(src, start, src.Length - start);
 return sb.ToString();
 }
}
</code></pre>

blocks|key|1483982|text|我也推荐使用前面提到的JSON.NET库，但是如果您必须在生成的JSON字符串中转义unicode字符(例如\uXXXX格式)，那么您可能必须自己进行转义。以Converting+Unicode+strings+to+escaped+ascii+string为例。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1483983|entityMap|0|LINK|mutability|MUTABLE|url|http://james.newtonking.com/projects/json-net.aspx|1|https://stackoverflow.com/questions/1615559/converting-unicode-strings-to-escaped-ascii-string^0|B|8|0|27|1E|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

I would also recommend using the <a href="http://james.newtonking.com/projects/json-net.aspx" rel="nofollow noreferrer">JSON.NET</a> library mentioned, but if you have to escape unicode characters (e.g. \uXXXX format) in the resulting JSON string, you may have to do it yourself. Take a look at <a href="https://stackoverflow.com/questions/1615559/converting-unicode-strings-to-escaped-ascii-string">Converting Unicode strings to escaped ascii string</a> for an example.

blocks|key|1269790|text|我对其中一些答案进行了速度测试，分别针对一个长字符串和一个短字符串。Clive+Paterson的code胜出了很多，大概是因为其他人都考虑到了序列化选项。以下是我的结果：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1269791|Apple+Banana
System.Web.HttpUtility.JavaScriptStringEncode:+140ms
System.Web.Helpers.Json.Encode:+326ms
Newtonsoft.Json.JsonConvert.ToString:+230ms
Clive+Paterson:+108ms

\\some\long\path\with\lots\of\things\to\escape\some\long\path\t\with\lots\of\n\things\to\escape\some\long\path\with\lots\of\"things\to\escape\some\long\path\with\lots"\of\things\to\escape
System.Web.HttpUtility.JavaScriptStringEncode:+2849ms
System.Web.Helpers.Json.Encode:+3300ms
Newtonsoft.Json.JsonConvert.ToString:+2827ms
Clive+Paterson:+1173ms|code-block|syntax|javascript|1269792|下面是测试代码：|1269793|public+static+void+Main(string[]+args)
{
++++var+testStr1+=+"Apple+Banana";
++++var+testStr2+=+@"\\some\long\path\with\lots\of\things\to\escape\some\long\path\t\with\lots\of\n\things\to\escape\some\long\path\with\lots\of\""things\to\escape\some\long\path\with\lots""\of\things\to\escape";

++++foreach+(var+testStr+in+new[]+{+testStr1,+testStr2+})
++++{
++++++++var+results+=+new+Dictionary<string,List<long>>();

++++++++for+(var+n+=+0;+n+<+10;+n%2B%2B)
++++++++{
++++++++++++var+count+=+1000+*+1000;

++++++++++++var+sw+=+Stopwatch.StartNew();
++++++++++++for+(var+i+=+0;+i+<+count;+i%2B%2B)
++++++++++++{
++++++++++++++++var+s+=+System.Web.HttpUtility.JavaScriptStringEncode(testStr);
++++++++++++}
++++++++++++var+t+=+sw.ElapsedMilliseconds;
++++++++++++results.GetOrCreate("System.Web.HttpUtility.JavaScriptStringEncode").Add(t);

++++++++++++sw+=+Stopwatch.StartNew();
++++++++++++for+(var+i+=+0;+i+<+count;+i%2B%2B)
++++++++++++{
++++++++++++++++var+s+=+System.Web.Helpers.Json.Encode(testStr);
++++++++++++}
++++++++++++t+=+sw.ElapsedMilliseconds;
++++++++++++results.GetOrCreate("System.Web.Helpers.Json.Encode").Add(t);

++++++++++++sw+=+Stopwatch.StartNew();
++++++++++++for+(var+i+=+0;+i+<+count;+i%2B%2B)
++++++++++++{
++++++++++++++++var+s+=+Newtonsoft.Json.JsonConvert.ToString(testStr);
++++++++++++}
++++++++++++t+=+sw.ElapsedMilliseconds;
++++++++++++results.GetOrCreate("Newtonsoft.Json.JsonConvert.ToString").Add(t);

++++++++++++sw+=+Stopwatch.StartNew();
++++++++++++for+(var+i+=+0;+i+<+count;+i%2B%2B)
++++++++++++{
++++++++++++++++var+s+=+cleanForJSON(testStr);
++++++++++++}
++++++++++++t+=+sw.ElapsedMilliseconds;
++++++++++++results.GetOrCreate("Clive+Paterson").Add(t);
++++++++}

++++++++Console.WriteLine(testStr);
++++++++foreach+(var+result+in+results)
++++++++{
++++++++++++Console.WriteLine(result.Key+%2B+":+"+%2B+Math.Round(result.Value.Skip(1).Average())+%2B+"ms");
++++++++}
++++++++Console.WriteLine();
++++}

++++Console.ReadLine();
}|1269794|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/17691629/1418484^0|1D|4|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

I ran speed tests on some of these answers for a long string and a short string. Clive Paterson's <a href="https://stackoverflow.com/a/17691629/1418484">code</a> won by a good bit, presumably because the others are taking into account serialization options. Here are my results:

<pre><code>Apple Banana
System.Web.HttpUtility.JavaScriptStringEncode: 140ms
System.Web.Helpers.Json.Encode: 326ms
Newtonsoft.Json.JsonConvert.ToString: 230ms
Clive Paterson: 108ms

\\some\long\path\with\lots\of\things\to\escape\some\long\path\t\with\lots\of\n\things\to\escape\some\long\path\with\lots\of\"things\to\escape\some\long\path\with\lots"\of\things\to\escape
System.Web.HttpUtility.JavaScriptStringEncode: 2849ms
System.Web.Helpers.Json.Encode: 3300ms
Newtonsoft.Json.JsonConvert.ToString: 2827ms
Clive Paterson: 1173ms
</code></pre>

And here is the test code:

<pre><code>public static void Main(string[] args)
{
 var testStr1 = "Apple Banana";
 var testStr2 = @"\\some\long\path\with\lots\of\things\to\escape\some\long\path\t\with\lots\of\n\things\to\escape\some\long\path\with\lots\of\""things\to\escape\some\long\path\with\lots""\of\things\to\escape";

 foreach (var testStr in new[] { testStr1, testStr2 })
 {
 var results = new Dictionary&lt;string,List&lt;long&gt;&gt;();

 for (var n = 0; n &lt; 10; n++)
 {
 var count = 1000 * 1000;

 var sw = Stopwatch.StartNew();
 for (var i = 0; i &lt; count; i++)
 {
 var s = System.Web.HttpUtility.JavaScriptStringEncode(testStr);
 }
 var t = sw.ElapsedMilliseconds;
 results.GetOrCreate("System.Web.HttpUtility.JavaScriptStringEncode").Add(t);

 sw = Stopwatch.StartNew();
 for (var i = 0; i &lt; count; i++)
 {
 var s = System.Web.Helpers.Json.Encode(testStr);
 }
 t = sw.ElapsedMilliseconds;
 results.GetOrCreate("System.Web.Helpers.Json.Encode").Add(t);

 sw = Stopwatch.StartNew();
 for (var i = 0; i &lt; count; i++)
 {
 var s = Newtonsoft.Json.JsonConvert.ToString(testStr);
 }
 t = sw.ElapsedMilliseconds;
 results.GetOrCreate("Newtonsoft.Json.JsonConvert.ToString").Add(t);

 sw = Stopwatch.StartNew();
 for (var i = 0; i &lt; count; i++)
 {
 var s = cleanForJSON(testStr);
 }
 t = sw.ElapsedMilliseconds;
 results.GetOrCreate("Clive Paterson").Add(t);
 }

 Console.WriteLine(testStr);
 foreach (var result in results)
 {
 Console.WriteLine(result.Key + ": " + Math.Round(result.Value.Skip(1).Average()) + "ms");
 }
 Console.WriteLine();
 }

 Console.ReadLine();
}
</code></pre>

blocks|key|1484495|text|我很好地使用了一行代码，像其他人一样使用了JsonConvert，但是添加了子字符串来删除添加的引号和反斜杠。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1484496|+var+escapedJsonString+=+JsonConvert.ToString(JsonString).Substring(1,+JsonString.Length+-+2);|code-block|syntax|javascript|1484497|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I nice one-liner, used JsonConvert as others have but added substring to remove the added quotes and backslash.

<pre><code> var escapedJsonString = JsonConvert.ToString(JsonString).Substring(1, JsonString.Length - 2);
</code></pre>

blocks|key|1269572|text|System.Web.Helpers.Json.Encode(...)怎么样？(请参阅http://msdn.microsoft.com/en-us/library/system.web.helpers.json.encode(v=vs.111).aspx|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1269573|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.web.helpers.json.encode(v=vs.111%2529.aspx)^0|17|2D|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

What about System.Web.Helpers.Json.Encode(...) (see <a href="http://msdn.microsoft.com/en-us/library/system.web.helpers.json.encode(v=vs.111).aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/system.web.helpers.json.encode(v=vs.111).aspx</a>)?

blocks|key|1484124|text|String.Format("X",+c);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1484125|这只是输出:x|unstyled|1484126|试着这样做：|1484127|string+t+=+((int)c).ToString("X");

sb.Append("\\u"+%2B+t.PadLeft(4,+'0'));|1484128|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$B|C]]|$1|K|3|-4|5|F|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<pre><code>String.Format("X", c);
</code></pre>

That just outputs: X

Try this instead:

<pre><code>string t = ((int)c).ToString("X");

sb.Append("\\u" + t.PadLeft(4, '0'));
</code></pre>

blocks|key|1269389|text|在Codeplex上有一个Json库|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1269390|entityMap|0|LINK|mutability|MUTABLE|url|http://www.codeplex.com/Json^0|1|8|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

There's a Json library at <a href="http://www.codeplex.com/Json" rel="nofollow noreferrer">Codeplex</a>

blocks|key|1270052|text|我选择使用System.Web.Script.Serialization.JavaScriptSerializer。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1270053|我有一个小的静态助手类，定义如下：|1270054|internal+static+partial+class+Serialization
{
++++static+JavaScriptSerializer+serializer;
++++
++++static+Serialization()
++++{
++++++++serializer+=+new+JavaScriptSerializer();
++++++++serializer.MaxJsonLength+=+Int32.MaxValue;
++++}
++++public+static+string+ToJSON<T>(T+obj)
++++{
++++++++return+serializer.Serialize(obj);
++++}
++++public+static+T+FromJSON<T>(string+data)
++++{
++++++++if+(Common.IsEmpty(data))
++++++++++++return+default(T);
++++++++else
++++++++++++return+serializer.Deserialize<T>(data);
++++}
}|code-block|syntax|javascript|1270055|序列化任何我只调用Serialization.ToJSON(itemToSerialize)的东西|1270056|要进行反序列化，我只需调用Serialization.FromJSON<T>(jsonValueOfTypeT)|1270057|entityMap^0|5|1G|0|0|0|9|11|0|D|17|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|W|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|O|3|P|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|13|8|@]|D|@]|E|$]]]|R|$]]

I chose to use <code>System.Web.Script.Serialization.JavaScriptSerializer</code>.
I have a small static helper class defined as follows:
<pre><code>internal static partial class Serialization
{
 static JavaScriptSerializer serializer;
 
 static Serialization()
 {
 serializer = new JavaScriptSerializer();
 serializer.MaxJsonLength = Int32.MaxValue;
 }
 public static string ToJSON&lt;T&gt;(T obj)
 {
 return serializer.Serialize(obj);
 }
 public static T FromJSON&lt;T&gt;(string data)
 {
 if (Common.IsEmpty(data))
 return default(T);
 else
 return serializer.Deserialize&lt;T&gt;(data);
 }
}
</code></pre>
To serialize anything I just call <code>Serialization.ToJSON(itemToSerialize)</code>
To deserialize I just call <code>Serialization.FromJSON&lt;T&gt;(jsonValueOfTypeT)</code>

Are there any classes/functions available to be used for easy JSON escaping? I'd rather not have to write my own.

How to escape JSON string?

JSON

是否有任何类/函数可用于简单的JSON转义？我宁愿不用写我自己的代码。

问如何转义JSON字符串？
EN

回答 14

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何转义JSON字符串？EN

回答 14

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何转义JSON字符串？
EN