27.7 Step 2. Upload Image
Add the following to the form so it will look like Figure 27.1:
-
Upload button
-
Search button
-
TextBox
-
Error message label
Double click the “Submit” button and enter:
private void Submit1_ServerClick(object sender, System.EventArgs e)
{
if( ( File1.PostedFile != null ) && ( File1.PostedFile.ContentLength > 0 ) )
{
string fn = System.IO.Path.GetFileName(File1.PostedFile.FileName);
SaveLocation = Server.MapPath("Data") + "\\" + fn;
Session [ "theFileName" ] = SaveLocation;
string displayLocation = dataPath + "\\" + fn;
try
{
File1.PostedFile.SaveAs(SaveLocation);
Label2.Text = "Upload file to: " + displayLocation;
Image2.ImageUrl = displayLocation;
TextBox2.Text =
System.IO.Path.GetFileName(File1.PostedFile.FileName);
}
catch ( Exception ex )
{
Label2.Text = "Error: " + ex.Message;
}
}
else
{
Response.Write("Please select a file to upload.");
}
}
First of all, the following code makes sure a valid image has been selected:
if( ( File1.PostedFile != null ) && ( File1.PostedFile.ContentLength > 0 ) )
{
…
}
else
{
Response.Write("Please select a file to upload.");
}
The following code finds the image name from the client’s computer and creates the path for this image on the server:
string fn = System.IO.Path.GetFileName(File1.PostedFile.FileName);
SaveLocation = Server.MapPath("Data") + "\\" + fn;
The following code uploads the file:
try
{
File1.PostedFile.SaveAs(SaveLocation);
}
catch ( Exception ex )
{
Label2.Text = "Error: " + ex.Message;
}
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