我的验证码是这样实现的 private void ValidateCode(string VNum)
{
Bitmap Img=null;
Graphics g=null;
MemoryStream ms=null; int gheight=VNum.Length*14;
Img=new Bitmap(gheight,25);
g=Graphics.FromImage(Img);
//背景颜色
g.Clear(Color.Gray);
//文字字体
Font f=new Font("ArialBlack",12);
//文字颜色
SolidBrush s=new SolidBrush(Color.Black);
g.DrawString(VNum,f,s,3,3);
ms=new MemoryStream();
Img.Save(ms,ImageFormat.Jpeg);
Response.ClearContent();
Response.ContentType="image/Jpeg";
Response.BinaryWrite(ms.ToArray()); g.Dispose();
Img.Dispose();
Response.End();
}配置文件里增加的内容: <httpHandlers>
<add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
</httpHandlers>因为使用了ajax控件,所以要把配置文件加上这句,但是加了这句以后登录页的验证码就不显示了,是为什么?
这个情况只出现在服务器上了,我本地没有这问题。是否跟服务器配置有关?怎么弄??
{
Bitmap Img=null;
Graphics g=null;
MemoryStream ms=null; int gheight=VNum.Length*14;
Img=new Bitmap(gheight,25);
g=Graphics.FromImage(Img);
//背景颜色
g.Clear(Color.Gray);
//文字字体
Font f=new Font("ArialBlack",12);
//文字颜色
SolidBrush s=new SolidBrush(Color.Black);
g.DrawString(VNum,f,s,3,3);
ms=new MemoryStream();
Img.Save(ms,ImageFormat.Jpeg);
Response.ClearContent();
Response.ContentType="image/Jpeg";
Response.BinaryWrite(ms.ToArray()); g.Dispose();
Img.Dispose();
Response.End();
}配置文件里增加的内容: <httpHandlers>
<add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
</httpHandlers>因为使用了ajax控件,所以要把配置文件加上这句,但是加了这句以后登录页的验证码就不显示了,是为什么?
这个情况只出现在服务器上了,我本地没有这问题。是否跟服务器配置有关?怎么弄??
<tr align="center">
<td align="right" width="50%" style="height: 15px">验 证 码:
</td>
<td noWrap style="height: 15px" align="left">
<asp:textbox id="txt" runat="server" Width="144px" Height="14px"></asp:textbox></td>
</tr>
<tr>
<td align="center" colSpan="3">
<asp:label id="lbl" runat="server" Width="38px">
<IMG src="CheckCode.aspx" align="absmiddle"></asp:label></td>
</tr>
CheckCode里生存图片
public void CreateCheckCodeImage(string checkCode)
{
if (checkCode == null || checkCode.Trim() == String.Empty)
return;
System.Drawing.Bitmap image = new System.Drawing.Bitmap((int)Math.Ceiling((checkCode.Length * 12.5)), 22);
Graphics g = Graphics.FromImage(image);
try
{
Random random = new Random();
g.Clear(Color.White);
for (int i = 0; i < 25; i++)
{
int x1 = random.Next(image.Width);
int x2 = random.Next(image.Width);
int y1 = random.Next(image.Height);
int y2 = random.Next(image.Height); g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);
} Font font = new System.Drawing.Font("Arial", 12, (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic));
System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f, true);
g.DrawString(checkCode, font, brush, 2, 2);
for (int i = 0; i < 100; i++)
{
int x = random.Next(image.Width);
int y = random.Next(image.Height);
image.SetPixel(x, y, Color.FromArgb(random.Next()));
}
g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1); System.IO.MemoryStream ms = new System.IO.MemoryStream();
image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
HttpContext.Current.Response.ClearContent();
HttpContext.Current.Response.ContentType = "image/Gif";
HttpContext.Current.Response.BinaryWrite(ms.ToArray());
}
finally
{
g.Dispose();
image.Dispose();
}
}
<httpHandlers>
<add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
</httpHandlers>
去掉 验证码就没有问题,加上这句就不显示了,真是奇怪了