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Writing a value to a datagrid

Posted on 2016-08-04
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Last Modified: 2016-08-04
Hello,

I have an application that allows user to add a new record in a datagrid view for a list of users; small table.

I check to see if the user 'forgot' to add certain fields required by my program. If they forgot the field I write a default value for them. The situation is this:

1. I ADD a new record
2. The user is entered just fine while leaving out these two fields that I'm checking for.
3. This code errors out telling me that:
An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in mscorlib.dll. Additional information: Index was out of range. Must be non-negative and less than the size of the collection.

I sure hope that you can help me!


Dim x
        x = Log_In_CredentialsDataGridView.SelectedRows(0).Cells(5).Value.ToString
        If x = "" Then Log_In_CredentialsDataGridView.SelectedRows(0).Cells(5).Value = 5

        Dim y
        y = Log_In_CredentialsDataGridView.SelectedRows(0).Cells(6).Value.ToString
        If y = "" Then Log_In_CredentialsDataGridView.SelectedRows(0).Cells(6).Value = 0
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Question by:SchoolTeacher54
1 Comment
 
LVL 79

Accepted Solution

by:
David Johnson, CD, MVP earned 500 total points
ID: 41743438
if you try and convert a NULL to a string you will get problems, test for it first

if Log_In_CredentialsDataGridView.SelectedRows(0).Cells(5).Value is Nothing Then
Log_In_CredentialsDataGridView.SelectedRows(0).Cells(5).Value = 5
Endif

if Log_In_CredentialsDataGridView.SelectedRows(0).Cells(6).Value is Nothing Then
Then Log_In_CredentialsDataGridView.SelectedRows(0).Cells(6).Value = 0
Endif

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