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Object reference not set to an instance of an object.

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Join Date: Apr 2008

Posts: 114

Reputation: ninjaimp is an unknown quantity at this point

Solved Threads: 6

ninjaimp

Offline

Junior Poster

Object reference not set to an instance of an object.

May 12th, 2008

Hi

I have a dataset which is popultaed with data from a text file, which in turn then populates a datagrid. This all works fine.

What im trying to do is search within the dataset based on a value input into a text box.

But everytime i do the search i keep gettign the error:

Object reference not set to an instance of an object.

The code i am using for the search is this:

 Help with Code Tags 
 VB.NET Syntax (Toggle Plain Text) 
Dim re As String
        Dim s As String
        Dim i As Integer
        Dim TotalRows As Integer
 
        TotalRows = dt.Rows.Count
 
        s = LCase(txtSearch.Text)
 
        lstResults.Items.Clear()
 
        For i = 1 To TotalRows
 
            re = ds.Tables("CdrData").Rows(i).Item(5)
            If InStr(LCase(re), s) Then
                lstResults.Items.Add(ds.Tables("CdrData").Rows(i).Item(1))
            End If
 
        Next
Dim re As String
        Dim s As String
        Dim i As Integer
        Dim TotalRows As Integer

        TotalRows = dt.Rows.Count

        s = LCase(txtSearch.Text)

        lstResults.Items.Clear()

        For i = 1 To TotalRows

            re = ds.Tables("CdrData").Rows(i).Item(5)
            If InStr(LCase(re), s) Then
                lstResults.Items.Add(ds.Tables("CdrData").Rows(i).Item(1))
            End If

        Next

I ust cant see what the problem is?

MAny thanks

•

Join Date: May 2008

Posts: 144

Reputation: sierrainfo is an unknown quantity at this point

Solved Threads: 9

sierrainfo sierrainfo is offline

Offline

Junior Poster

Re: Object reference not set to an instance of an object.

May 15th, 2008

This error occurs when 'New' has not been used to initialize an object. But there could be another possibility..Comment this line and see..
lstResults.Items.Clear()

Regards
Sunil Punjabi
<URL snipped>

Last edited by Ancient Dragon; May 18th, 2008 at 6:50 am. Reason: snipped url