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ASP+上传文件语法

[日期:2004-10-18] 来源:  作者: [字体: ]
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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