如何在上传的图片上写字 -- 开发文档--源码资源网 www.Coderes.com

<%@ Page Language="c#" Debug="true" Trace="true"%>
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Drawing" %>
<%@ Import Namespace="System.Drawing.Imaging" %>
<html>
<script runat =server>
void UploadBtn_Click Object sender, EventArgs e) {
String filename;
String filename1;
String[] filename2;
int q;
filename=UploadFile.PostedFile.FileName ;
filename2=filename.Split new Char[] {’\\’});
q=filename2.GetUpperBound 0);
filename1=filename2[q];
dis.Text="上传文件名："+filename1+"<br>";
UploadFile.PostedFile.SaveAs Server.MapPath filename1));
ImageEditor.Visible = true;
dis.Text+="文件大小："+UploadFile.PostedFile.ContentLength+"字节数";
Image1.Src=filename1;
}
void UpdateBtn_Click Object sender, EventArgs e) {
String filename1;
filename1=Image1.Src;
System.Drawing.Image image = System.Drawing.Image.FromFile Server.MapPath filename1));
System.Drawing.Image newimage = new Bitmap image.Width, image.Height, PixelFormat.Format32bppRGB);
Graphics g = Graphics.FromImage newimage);
g.DrawImage image,0,0,image.Width,image.Height);
Font f = new Font FontType.SelectedItem.Text, Int32.Parse FontSize.SelectedItem.Text));
Brush b = new SolidBrush Color.Red);
g.DrawString Caption.Text, f, b, 10, 140);
g.Dispose );
System.Drawing.Image thumbImage = newimage.GetThumbnailImage Int32.Parse Width.Text),Int32.Parse
Height.Text),null,0);
image.Dispose );
thumbImage.Save Server.MapPath filename1), ImageFormat.JPEG);
Image1.Src=filename1;
Caption.Text="";

}

</script>

<body>
<asp:label id="dis" runat=server/>
<form enctype="multipart/form-data" runat=server>
选择上传文件: <input id="UploadFile" type=file runat=server>
<asp:button Text="Upload Me!" OnClick="UploadBtn_Click" runat=server/>
<hr>
<asp:panel id="ImageEditor" Visible=false runat=server>
<img ID="Image1" src="" runat="server"/>
图像宽度: <asp:textbox id="Width" runat=server/>
图像高度: <asp:textbox id="Height" runat=server/> <br>
文本标题: <asp:textbox id="Caption" runat=server/>
标题字号: <asp:dropdownlist id="FontSize" runat=server>
<asp:listitem>14</asp:listitem>
<asp:listitem>18</asp:listitem>
<asp:listitem>26</asp:listitem>
<asp:listitem>36</asp:listitem>
<asp:listitem>48</asp:listitem>
<asp:listitem>62</asp:listitem>
</asp:dropdownlist>
标题字体: <asp:dropdownlist id="FontType" runat=server>
<asp:listitem>黑体</asp:listitem>
<asp:listitem>仿宋</asp:listitem>
<asp:listitem>隶书</asp:listitem>
<asp:listitem>楷书</asp:listitem>
<asp:listitem>彩云</asp:listitem>
<asp:listitem>新魏</asp:listitem>
</asp:dropdownlist>

<asp:button Text="Update Image" OnClick="UpdateBtn_Click" runat=server/>
</asp:panel>
</form>

</body>
</html>

文章出处：

发表时间：2004-11-22 22:58:51

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