blocks|key|682464|text|您可以使用静态FromArgb方法创建颜色：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|682465|Color+redColor+=+Color.FromArgb(255,+0,+0);|code-block|syntax|javascript|682466|也可以使用following+overload指定alpha。|682467|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/cce5h557.aspx|1|http://msdn.microsoft.com/en-us/library/at1k42eh.aspx^0|7|8|0|0|0|5|I|1|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]]|$1|I|3|J|5|6|7|Z|8|@]|9|@$A|10|B|11|1|12]]|C|$]]|$1|K|3|-4|5|6|7|13|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]|S|$5|N|O|P|C|$Q|T]]]]

You could create a color using the static <a href="http://msdn.microsoft.com/en-us/library/cce5h557.aspx">FromArgb</a> method:

<pre><code>Color redColor = Color.FromArgb(255, 0, 0);
</code></pre>

You can also specify the alpha using the <a href="http://msdn.microsoft.com/en-us/library/at1k42eh.aspx">following overload</a>.

blocks|key|682511|text|必须使用Color.FromArgb方法创建新的颜色结构|type|unstyled|depth|inlineStyleRanges|entityRanges|data|682512|var+newColor+=+Color.FromArgb(0xCC,0xBB,0xAA);|code-block|syntax|javascript|682513|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|$]]

You must use Color.FromArgb method to create new color structure

<pre><code>var newColor = Color.FromArgb(0xCC,0xBB,0xAA);
</code></pre>

blocks|key|682544|text|您可以进行扩展以仅更改一个颜色分量|type|unstyled|depth|inlineStyleRanges|entityRanges|data|682545|static+class+ColorExtension
{
++++public+static+Color+ChangeG(Color+this+color,byte+g)+
++++{
++++++++return+Color.FromArgb(color.A,color.R,g,color.B);
++++}
}|code-block|syntax|javascript|682546|然后，您可以使用以下命令：|682547|++yourColor+=+yourColor.ChangeG(100);|682548|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You can make extension to just change one color component

<pre><code>static class ColorExtension
{
 public static Color ChangeG(Color this color,byte g) 
 {
 return Color.FromArgb(color.A,color.R,g,color.B);
 }
}
</code></pre>

then you can use this:

<pre><code> yourColor = yourColor.ChangeG(100);
</code></pre>

blocks|key|682472|text|你可以这样做：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|682473|Color+c+=+Color.FromArgb(red,+green,+blue);+//red,+green+and+blue+are+integer+variables+containing+red,+green+and+blue+components|code-block|syntax|javascript|682474|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|$]]

You could do:

<pre><code>Color c = Color.FromArgb(red, green, blue); //red, green and blue are integer variables containing red, green and blue components
</code></pre>

blocks|key|682555|text|using+System;
using+System.Drawing;
public+struct+MyColor
++++{
++++++++private+byte+a,+r,+g,+b;++++++++
++++++++public+byte+A
++++++++{
++++++++++++get
++++++++++++{
++++++++++++++++return+this.a;
++++++++++++}
++++++++}
++++++++public+byte+R
++++++++{
++++++++++++get
++++++++++++{
++++++++++++++++return+this.r;
++++++++++++}
++++++++}
++++++++public+byte+G
++++++++{
++++++++++++get
++++++++++++{
++++++++++++++++return+this.g;
++++++++++++}
++++++++}
++++++++public+byte+B
++++++++{
++++++++++++get
++++++++++++{
++++++++++++++++return+this.b;
++++++++++++}
++++++++}+++++++
++++++++public+MyColor+SetAlpha(byte+value)
++++++++{
++++++++++++this.a+=+value;
++++++++++++return+this;
++++++++}
++++++++public+MyColor+SetRed(byte+value)
++++++++{
++++++++++++this.r+=+value;
++++++++++++return+this;
++++++++}
++++++++public+MyColor+SetGreen(byte+value)
++++++++{
++++++++++++this.g+=+value;
++++++++++++return+this;
++++++++}
++++++++public+MyColor+SetBlue(byte+value)
++++++++{
++++++++++++this.b+=+value;
++++++++++++return+this;
++++++++}
++++++++public+int+ToArgb()
++++++++{
++++++++++++return+(int)(A+<<+24)+%7C%7C+(int)(R+<<+16)+%7C%7C+(int)(G+<<+8)+%7C%7C+(int)(B);
++++++++}
++++++++public+override+string+ToString+()
++++++++{
++++++++++++return+string.Format+("[MyColor:+A={0},+R={1},+G={2},+B={3}]",+A,+R,+G,+B);
++++++++}

++++++++public+static+MyColor+FromArgb(byte+alpha,+byte+red,+byte+green,+byte+blue)
++++++++{
++++++++++++return+new+MyColor().SetAlpha(alpha).SetRed(red).SetGreen(green).SetBlue(blue);
++++++++}
++++++++public+static+MyColor+FromArgb(byte+red,+byte+green,+byte+blue)
++++++++{
++++++++++++return+MyColor.FromArgb(255,+red,+green,+blue);
++++++++}
++++++++public+static+MyColor+FromArgb(byte+alpha,+MyColor+baseColor)
++++++++{
++++++++++++return+MyColor.FromArgb(alpha,+baseColor.R,+baseColor.G,+baseColor.B);
++++++++}
++++++++public+static+MyColor+FromArgb(int+argb)
++++++++{
++++++++++++return+MyColor.FromArgb(argb+&+255,+(argb+>>+8)+&+255,+(argb+>>+16)+&+255,+(argb+>>+24)+&+255);
++++++++}+++
++++++++public+static+implicit+operator+Color(MyColor+myColor)
++++++++{+++++++++++
++++++++++++return+Color.FromArgb(myColor.ToArgb());
++++++++}
++++++++public+static+implicit+operator+MyColor(Color+color)
++++++++{
++++++++++++return+MyColor.FromArgb(color.ToArgb());
++++++++}
++++}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|682556|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>using System;
using System.Drawing;
public struct MyColor
 {
 private byte a, r, g, b; 
 public byte A
 {
 get
 {
 return this.a;
 }
 }
 public byte R
 {
 get
 {
 return this.r;
 }
 }
 public byte G
 {
 get
 {
 return this.g;
 }
 }
 public byte B
 {
 get
 {
 return this.b;
 }
 } 
 public MyColor SetAlpha(byte value)
 {
 this.a = value;
 return this;
 }
 public MyColor SetRed(byte value)
 {
 this.r = value;
 return this;
 }
 public MyColor SetGreen(byte value)
 {
 this.g = value;
 return this;
 }
 public MyColor SetBlue(byte value)
 {
 this.b = value;
 return this;
 }
 public int ToArgb()
 {
 return (int)(A &lt;&lt; 24) || (int)(R &lt;&lt; 16) || (int)(G &lt;&lt; 8) || (int)(B);
 }
 public override string ToString ()
 {
 return string.Format ("[MyColor: A={0}, R={1}, G={2}, B={3}]", A, R, G, B);
 }

 public static MyColor FromArgb(byte alpha, byte red, byte green, byte blue)
 {
 return new MyColor().SetAlpha(alpha).SetRed(red).SetGreen(green).SetBlue(blue);
 }
 public static MyColor FromArgb(byte red, byte green, byte blue)
 {
 return MyColor.FromArgb(255, red, green, blue);
 }
 public static MyColor FromArgb(byte alpha, MyColor baseColor)
 {
 return MyColor.FromArgb(alpha, baseColor.R, baseColor.G, baseColor.B);
 }
 public static MyColor FromArgb(int argb)
 {
 return MyColor.FromArgb(argb &amp; 255, (argb &gt;&gt; 8) &amp; 255, (argb &gt;&gt; 16) &amp; 255, (argb &gt;&gt; 24) &amp; 255);
 } 
 public static implicit operator Color(MyColor myColor)
 { 
 return Color.FromArgb(myColor.ToArgb());
 }
 public static implicit operator MyColor(Color color)
 {
 return MyColor.FromArgb(color.ToArgb());
 }
 }
</code></pre>

Hi how to set <code>R G B</code> values in <code>System.Drawing.Color.G</code> ?

which is like <code>System.Drawing.Color.G=255;</code> is not allowed because its read only 

<pre><code>Property or indexer 'System.Drawing.Color.G' cannot be assigned toit is read only
</code></pre>

i just need to create a <code>Color</code> Object by assigning custom <code>R G B</code> values

Set System.Drawing.Color values

Hi如何在System.Drawing.Color.G中设置R G B值？这就像System.Drawing.Color.G=255;是不允许的，因为它是只读的Property or indexer 'System.Drawing.Color.G' cannot be assigned toit is read only我只需要通过分配自定义的R G B值来创建一个Color对象

问设置System.Drawing.Color值
EN

回答 5

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问设置System.Drawing.Color值EN

回答 5

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问设置System.Drawing.Color值
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