I had HTML input control to upload file but the file returns empty.
<input type="file" class="upload" runat="server" id="FUFile"/>
string tempVar = "~/res/Posts/" + FUFile.Value.ToString();
FUFile.ResolveUrl(Server.MapPath(tempVar));
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2 Answers
The file is posting from the fileupload properly. If you need to save the FUFile.PostedFile :
if (FUFile.PostedFile != null)
{
string tempVar = "~/res/Posts/" + FUFile.Value.ToString();
FUFile.PostedFile.SaveAs(Server.MapPath(tempVar));
}
Here's how you can test it:
In markup I have this:
<input type="file" class="upload" runat="server" id="FUFile"/>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" />
In code I have this method:
protected void Button1_Click(object sender, EventArgs e)
{
if (FUFile.PostedFile != null)
{
string tempVar = "~/res/Posts/" + FUFile.Value.ToString();
FUFile.PostedFile.SaveAs(Server.MapPath(tempVar));
}
}
When I select a file and click the button, it uploads the file to ../res/Posts folder.
1 Comment
skdeveloper
I had this error Object reference not set to an instance of an object
Just use a FileUpload control
<asp:FileUpload runat="server" ID="FUFile">
<asp:Button runat="server" ID="UploadButton" Text="Upload file" OnClick="UploadButton_Click"/>
You can then use FUFile's properties (FileContent for a stream, FileBytes for the full content as an array of bytes, PostedFile for the HttpPostedFile object which has the SaveAs method) as you need.
For example, see this answer for saving the stream: How do I save a stream to a file in C#?
See a full example at http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.fileupload(v=vs.110).aspx
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