CODEWITHSUNDEEP
asp.netvb.netbutton
actKing
actKing

Reputation: 45

Unable to cast object of type 'ASP.webform1_aspx' to type 'System.Web.UI.WebControls.Button'

when view in browser, i got this error: Unable to cast object of type 'ASP.webform1_aspx' to type 'System.Web.UI.WebControls.Button'.

how should i solve this problem?

    Line 7:          If Not Page.IsPostBack Then
    Line 8:              Dim rowIndex As Integer = 0  
    <b>Line 9:              Dim btn As Button = DirectCast(sender, Button)</b>
    Line 10:             'Get reference of the gridview row of the button clicked.
    Line 11:             Dim GridView2 As GridViewRow = DirectCast(btn.Parent.Parent, GridViewRow)
    Line 12:             Dim txt1 As TextBox = TryCast(GridView2.Cells(1).FindControl("TextBox1"), TextBox)

Upvotes: 0

Views: 1830

Answers (2)

Devin Burke
Devin Burke

Reputation: 13820

You are working with the wrong object. Either your sender is your web form or btn.Parent.Parent is your web form. Obviously, you can't cast a web form as a button.

If this code is contained in a Button_Click event, then your sender is probably a button. In that case, I would change btn.Parent.Parent to btn.Parent because that is probably your grid view row if the next level up is the web form.

UPDATE: It looks like this is in the Page_Load event. In that case, the sender is the web form and not the button. Refer to the button name directly to fix the issue.

Upvotes: 1

Mubarek
Mubarek

Reputation: 2689

You're righting this code inside the page load event in which case the sender object is the page itself and you're trying to cast that sender to a button control. The event I think is not fired because of a button but rather because of a page.

Remove this line and problem is gone

   <b>Line 9:              Dim btn As Button = DirectCast(sender, Button)</b>

Upvotes: 0

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