blocks|key|1329519|text|你遗漏了对System.Configuration.dll的引用吗？ConfigurationManager类就在那里。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1329520|编辑：System.Configuration命名空间包含mscorlib.dll、system.dll和system.configuration.dll中的类。您的项目总是包含mscorlib.dll和system.dll引用，但是必须将system.configuration.dll添加到大多数项目类型中，因为缺省情况下它不在那里……|1329521|entityMap^0|Y|K|0|3|K|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|P|8|@]|D|@]|E|$]]]|I|$]]

Are you missing the reference to System.Configuration.dll? <code>ConfigurationManager</code> class lies there.

EDIT: The <code>System.Configuration</code> namespace has classes in mscorlib.dll, system.dll and in system.configuration.dll. Your project always include the mscorlib.dll and system.dll references, but system.configuration.dll must be added to most project types, as it's not there by default...

blocks|key|1544776|text|尝试添加对System.Configuration的引用，您可以通过引用System名称空间获得一些配置名称空间，添加对System.Configuration的引用应该允许您访问ConfigurationManager。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1544777|entityMap^0|5|K|2I|K|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

Try adding a Reference to <code>System.Configuration</code>, you get some of the configuration namespace by referencing the System namespace, adding the reference to System.Configuration should allow you to access <code>ConfigurationManager</code>.

blocks|key|1329617|text|这是可行的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1329618|public+static+void+AddValue(string+key,+string+value)
{
++++Configuration+config+=+ConfigurationManager.OpenExeConfiguration(Application.ExecutablePath);
++++config.AppSettings.Settings.Add(key,+value);
++++config.Save(ConfigurationSaveMode.Minimal);
}|code-block|syntax|javascript|1329619|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|$]]

This works:

<pre><code>public static void AddValue(string key, string value)
{
 Configuration config = ConfigurationManager.OpenExeConfiguration(Application.ExecutablePath);
 config.AppSettings.Settings.Add(key, value);
 config.Save(ConfigurationSaveMode.Minimal);
}
</code></pre>

blocks|key|1329621|text|我希望这能行得通：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1329622|System.Configuration.Configuration+config=+ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

config.AppSettings.Settings["Yourkey"].Value+=+"YourValue";
config.Save(ConfigurationSaveMode.Modified);|code-block|syntax|javascript|1329623|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 hope this works: 

<pre><code>System.Configuration.Configuration config= ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);

config.AppSettings.Settings["Yourkey"].Value = "YourValue";
config.Save(ConfigurationSaveMode.Modified);
</code></pre>

blocks|key|1544872|text|很抱歉回答晚了，但我的代码可能会对你有所帮助。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1544873|我在winform界面上放置了3个按钮。button1+&2将设置不同的值，而button3将检索当前值。因此，当首先运行我的代码时，添加引用System.configuration|1544874|然后单击第一个按钮，然后单击第三个按钮，查看设置了什么值。下一次，再次单击第二个和第三个按钮，再次查看更改后设置的值。|1544875|所以这是代码。|1544876|using+System.Configuration;

+private+void+button1_Click(object+sender,+EventArgs+e)
{
++++Configuration+config+=+ConfigurationManager.OpenExeConfiguration(Application.ExecutablePath);
++++config.AppSettings.Settings.Remove("DBServerName");
++++config.AppSettings.Settings.Add("DBServerName",+"FirstAddedValue1");
++++config.Save(ConfigurationSaveMode.Modified);
}

private+void+button2_Click(object+sender,+EventArgs+e)
{
++++Configuration+config+=+ConfigurationManager.OpenExeConfiguration(Application.ExecutablePath);
++++config.AppSettings.Settings.Remove("DBServerName");
++++config.AppSettings.Settings.Add("DBServerName",+"SecondAddedValue1");
++++config.Save(ConfigurationSaveMode.Modified);
}

private+void+button3_Click(object+sender,+EventArgs+e)
{
++++Configuration+config+=+ConfigurationManager.OpenExeConfiguration(Application.ExecutablePath);
++++++++++MessageBox.Show(config.AppSettings.Settings["DBServerName"].Value);
}|code-block|syntax|javascript|1544877|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|R|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|S|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

sorry for late answer but may be my code may help u.

I placed 3 buttons on the winform surface. button1 &amp; 2 will set different value and button3 will retrieve current value. so when run my code first add the reference System.configuration

and click on first button and then click on 3rd button to see what value has been set.
next time again click on second &amp; 3rd button to see again what value has been set after change.

so here is the code.

<pre><code>using System.Configuration;

 private void button1_Click(object sender, EventArgs e)
{
 Configuration config = ConfigurationManager.OpenExeConfiguration(Application.ExecutablePath);
 config.AppSettings.Settings.Remove("DBServerName");
 config.AppSettings.Settings.Add("DBServerName", "FirstAddedValue1");
 config.Save(ConfigurationSaveMode.Modified);
}

private void button2_Click(object sender, EventArgs e)
{
 Configuration config = ConfigurationManager.OpenExeConfiguration(Application.ExecutablePath);
 config.AppSettings.Settings.Remove("DBServerName");
 config.AppSettings.Settings.Add("DBServerName", "SecondAddedValue1");
 config.Save(ConfigurationSaveMode.Modified);
}

private void button3_Click(object sender, EventArgs e)
{
 Configuration config = ConfigurationManager.OpenExeConfiguration(Application.ExecutablePath);
 MessageBox.Show(config.AppSettings.Settings["DBServerName"].Value);
}
</code></pre>

I need to insert key value pairs in app.Config as follows:

<pre><code>&lt;configuration&gt;
 &lt;appSettings&gt;
 &lt;add key="Setting1" value="Value1" /&gt;
 &lt;add key="Setting2" value="Value2" /&gt;
 &lt;/appSettings&gt;
&lt;/configuration&gt;
</code></pre>

When I searched in google I got the following code snippet

<pre><code>System.Configuration.Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); // Add an Application Setting.

config.AppSettings.Settings.Add("ModificationDate",
 DateTime.Now.ToLongTimeString() + " ");

// Save the changes in App.config file.

config.Save(ConfigurationSaveMode.Modified);
</code></pre>

The above code is not working as ConfigurationManager is not found in System.Configuration namespace I'm using .NET 2.0.
How to add key-value pairs to app.Config programatically and retrieve them?

Add values to app.config and retrieve them

我需要在app.Config中插入键值对，如下所示：<configuration> <appSettings> <add key="Setting1" value="Value1" /> <add key="Setting2" value="Value2" /> </appSettings></config...

问将值添加到app.config并检索它们
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