object not set to an instance

Question

User1717218719 posted

I have the following code which aims to add data entered in the table to the repeater below. currently, the code I have I recieve an error "object not set to an instance" on line drwRow("RelatedDoc") = str1. I am unsure as to why this is happening any helpwould be great.

Answer 1

User409696431 posted

The code you have:

        If Not IsNothing(drwRow) Then
            '-- already in datatable

            MsgBox("Already in DataTable")
            Exit Sub

        Else

            drwRow("RelDoc") = str1
            dtbReldoc.Rows.Add(drwRow)

        End If

is trying to assign a value to a row that is already "Nothing", and it does not have the schema of the datatable.

Create a new row for that datatable, and assign the value there.  Try something like:

,,,

Else

Dim R As DataRow = dtbReldoc.NewRow
R("RelDoc") = str1
dtbReldoc.Rows.Add(R)

End If

Answer 2

User1717218719 posted

I actually got it working using the following code. thanks for your help

      '-- Get all items in labels in repeater
        dtbReldoc = GetRelatedDocItms()

        '-- Add new item
        '-- check if item is already in the datable
        Dim str1 As String = txtbox.Text

        drwRow = dtbReldoc.Rows.Find(str1)

        If Not IsNothing(drwRow) Then
            '-- already in datatable

            drwRow("RelDoc") = str1

          
            Exit Sub

        Else

            drwRow = dtbReldoc.NewRow()

            drwRow("RelDoc") = str1

            dtbReldoc.Rows.Add(drwRow)

        End If

        '--Bind
        Me.RptRelDoc.DataSource = dtbReldoc
        Me.RptRelDoc.DataBind()