技术资料 > .Net专区 > Asp.Net开发 : asp+文件上传增强实例

asp+文件上传增强实例

March 25,2004

按实际上传时的文件名称保存（不在是test.jpg了）图片可以改大小，图上写字（可选字体，我设的全是中文，^_^。大
小），没有解决字体颜色问题。

<%@ 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>

      <h3>

      Select File To Upload: <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"/>

         <h3>
            Image Width: <asp:textbox id="Width" runat=server/>

               Image Height: <asp:textbox id="Height" runat=server/> <br>

               Text Caption: <asp:textbox id="Caption" runat=server/>

               Caption Size: <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>
               Caption Font: <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>方正姚体</asp:listitem>
                                       <asp:listitem>华文彩云</asp:listitem>
                                    </asp:dropdownlist>

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

         </h3>
      </asp:panel>

   </form>

</body>
</html>