附件上传源码
<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>
<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>
