Question

I have a DataListItem which can potentially be a dropdownlist or a textbox. To get the value I would need to do:

 CType(item.FindControl('myControl'), TextBox).Text 

Or

CType(item.FindControl('myControl'), DropDownList).SelectedValue.ToString() 

The problem is, if it’s a dropdownlist I get..

Unable to cast object of type ‘System.Web.UI.WebControls.DropDownList’ to type ‘System.Web.UI.WebControls.TextBox’.

Is there a way to check if the CType will take before Ctyping it?

Answer 1

Use TryCast:

Dim txt as TextBox = TryCast(item.FindControl('myControl'), TextBox) If txt Is Nothing Then     TryCast(item.FindControl('myControl'), DropDownList) End If