asp.net 将字符串生成图片

[yanhua1987]

我想将字符串生成一张图片，如何写？

[Peter200694013]

字符串生成图片?

[yanhua1987]

[Quote=引用 1 楼 peter200694013 的回复:]

字符串生成图片?
[/Quote]

说简单点就是生成验证码的方法。

[wuyq11]

Base64String --> Image
public Image Base64StringToImage(string Base64String)
{
byte[] imageBytes = Convert.FromBase64String(Base64String);
MemoryStream stream = new MemoryStream(imageBytes);
return Image.FromStream(stream);
}
验证码很多
http://topic.csdn.net/u/20100106/20/680ae748-9e9e-4d88-93bc-8d7d555d23cb.html

[yanhua1987]

Private Sub Paint(ByVal strCode As String)
Dim strImgPath As String = Server.MapPath("myCodeImg.jpg")
Dim strTempPath As String = strImgPath
System.IO.File.Delete(strImgPath)

Const intWidth As Int16 = 400
Const intHeight As Int16 = 150

Dim myBimap As System.Drawing.Image = New System.Drawing.Bitmap(intWidth, intHeight)

Dim myG As System.Drawing.Graphics = System.Drawing.Graphics.FromImage(myBimap)

Dim myFont As System.Drawing.Font = New System.Drawing.Font("幼圆", 16, FontStyle.Bold)

Dim myRect As System.Drawing.RectangleF = New System.Drawing.RectangleF(2, 2, intWidth, intHeight)

Dim myBrush As System.Drawing.SolidBrush = New System.Drawing.SolidBrush(Color.White)

myG.Clear(Color.Blue)

myG.DrawString(strCode, myFont, myBrush, myRect)

myBimap.Save(strTempPath, System.Drawing.Imaging.ImageFormat.Jpeg)
Image1.ImageUrl = strTempPath
myG.Dispose()
myBimap.Dispose()
End Sub




我这个生成图片里的方法怎么没起作用，运行了不报错。也没任何反应。