Beginning ASP.NET 4.5 in CSharp and VB Opsylum

540 x CHAPTER 14 LINQ AND THE ADO.NET ENTITY FRAMEWORK
string physicalFolder = Server.MapPath(virtualFolder);
string fileName = Guid.NewGuid().ToString();
string extension = System.IO.Path.GetExtension(FileUpload1.FileName);
FileUpload1.SaveAs(System.IO.Path.Combine(physicalFolder, fileName + extension));
myPicture.ImageUrl = virtualFolder + fileName + extension;
7. Go back to Markup View and add three validation controls to the InsertItemTemplate: two
RequiredFieldValidator controls hooked up to the text boxes for the Description and
ToolTip, and one CustomValidator with its ErrorMessage set to Select a valid .jpg file.
Give the RequiredFieldValidator controls an ID such as reqDesc and reqToolTip and assign
the CustomValidator an ID of cusValImage. Finally, set the TextMode property of the text box
for the Description to MultiLine and enter a line break (a ) before the Insert button.
You should end up with the following code:
Description:
ToolTip:
8. Select the ListView control in Design View and set up an event handler for its ItemInserting
event by double-clicking the event in the Events tab of the Properties Grid. Complete the event handler
with the following code:
VB.NET
Protected Sub ListView1_ItemInserting(sender As Object,
e As ListViewInsertEventArgs) Handles ListView1.ItemInserting
Dim FileUpload1 As FileUpload =
CType(ListView1.InsertItem.FindControl("FileUpload1"), FileUpload)
If Not FileUpload1.HasFile OrElse
Not FileUpload1.FileName.ToLower().EndsWith(".jpg") Then
Dim cusValImage As CustomValidator =
CType(ListView1.InsertItem.FindControl("cusValImage"), CustomValidator)
cusValImage.IsValid = False
e.Cancel = True
End If
End Sub
C#
protected void ListView1_ItemInserting(object sender, ListViewInsertEventArgs e)
{
FileUpload FileUpload1 =