object reference not set to instant of object

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Hi...

I am working with repeater control..
Inside repeater control I have a link button and other controls like radiobuttonlist and textboxes
I want to write code as if user click on link button inside repeater then all values fron other controls inside the repeater should be saved somewhere

I wrote this code in ItemCommand event and access other control like

VB

Dim txtStart As TextBox = TryCast(e.Item.FindControl("txtdate"), TextBox)

ans accessing its text property as

VB

Dim s As String = txtStart.Text

its working fine...

but as I access other control like dropdownlist and use its property it gives exception
object reference not set to instant of object

VB

Dim ddlTenure As DropDownList = TryCast(e.Item.FindControl("drp1"), DropDownList)

VB

Dim a As String=ddlTenure.SelectedItem.Text

please try to resolve
thanks

Posted 22-Oct-13 23:38pm

Imadoddin

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Comments

Aravindba 23-Oct-13 5:42am

may be in dropdown list u cant get any value, may be null,or just use
Dim a As String=ddlTenure.Text or did u bind id in dropdown list ?

Zafar Sultan 23-Oct-13 5:44am

What about inserting a breakpoint at Dim ddlTenure As DropDownList.... and debug? You might come across the line causing trouble.

3 solutions

Solution 3

Item does not exists in the drop down list so it is giving an error. first initialize drop down then try to execute code. it will work.

Regards.

Posted 23-Oct-13 8:03am

Patel Nutan

Solution 1

Check your item names: does "drp1" exist?
If it does, then split your lines, and check each part in turn:

VB

Dim obj = e.Item.FindControl("drp1")

Is obj equal to Nothing? If it is double check the name!
If not, then

VB

Dim ddlTenure As DropDownList = TryCast(obj, DropDownList)

Is ddlTenure equal to Nothing? If it is, then you need to check the actual type of the dropdown and correct that.
Finally, check ddlTenure.SelectedItem against Nothing - if there is nothing selected, that will be your problem.

Posted 22-Oct-13 23:44pm

OriginalGriff

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Thanks7872 · Accepted Answer · 2013-10-22T23:46:00

Solution 2

Try this

C#

Dim ddlTenure As DropDownList = DirectCast(e.Item.FindControl("drp1"), DropDownList)

Dim a As String=ddlTenure.SelectedValue

Regards..

Posted 22-Oct-13 23:46pm

Thanks7872

Comments

[no name] 23-Oct-13 6:04am

Thank you sir...