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这里有一个怎样用ASP+上传文件的非常简单例子 <html> <script language="VB" runat=server> Sub UploadBtn_Click(Sender as Object, E as EventArgs)
UploadFile.PostedFile.SaveAs(Server.MapPath("test.jpg")) MyImage.ImageUrl = "test.jpg" MyImage.Visible = true
End Sub
</script>
<body>
<form enctype="multipart/form-data" runat=server>
<h3>
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:image id="MyImage" Visible=false runat=server/>
</form>
</body> </html>
Here is a more complex example, which enables you to upload a file, and then using the System.Drawing APIs to resize/crop the image, overlay a custom text message onto the image, and then save it back out to disk as a .jpg (note that this sample works with *any* browser). I've written this one in C# -- but you would obviously be able to use VB or JScript to do it as well:
<%@ Import Namespace="System.IO" %> <%@ Import Namespace="System.Drawing" %> <%@ Import Namespace="System.Drawing.Imaging" %>
<html>
<script language="C#" runat=server>
void UploadBtn_Click(Object sender, EventArgs e) {
UploadFile.PostedFile.SaveAs(Server.MapPath("test.jpg")); ImageEditor.Visible = true; }
void UpdateBtn_Click(Object sender, EventArgs e) {
System.Drawing.Image image = System.Drawing.Image.FromFile(Server.MapPath("test.jpg")); 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("Lucida Sans Unicode", 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("test.jpg"), ImageFormat.JPEG); }
</script>
<body>
<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 src="test.jpg">
<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>
<asp:button Text="Update Image" OnClick="UpdateBtn_Click" runat=server/>
</h3> </asp:panel>
</form> </body> </html>
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