How to check if any row is added to Datagridview

1
votes

I am using a Datagridview control on winform and a bindingsource for data. Data is filled in bindingsource and accordingly datagridview is populated. I am looking for an event or something like that which will fire up when a row from bindingsource is added to the datagridview.

I want to perform some operations over the added row. I tried with RowsAdded event but e.RowIndex is not being retrieved properly.

Edit1: Let's say I am having 10 records in database table. I am fetching these into bindingsource and using bindingsource as a datasource for Datagridview. Now while adding row to Datagridview, I want to perform some UI operations on the Datagridview. I used RowsAdded event but it is giving me RowIndex as 0 or 1 always. I also tried a foreach loop over RowsCount, and if I debug the code, the execution flow is as per the expectations, but on the UI it is not getting reflected. I have called Datagridview1.refresh() after everything is done.

Can you please help me out to get this ?

2
c#datagridviewbindingsource
There is also a RowCount property maybe that could help in fixing your index issue (just a guess since you didn't explain what is the issue) not being retrieved properly doesn't say much ! - V4Vendetta
Really sorry for short description. Actually I am also not getting how should I explain the scenario. Please find Edit1. - Vijay Balkawade

2 Answers

2
votes

When the user adds a new row using the row for new records, the DataGridViewRowsAddedEventArgs.RowIndex value in the handler for this event is equal to the index of the new location of the row for new records, which is one greater than the row just added.

When you add rows programmatically, however, the RowIndex value is the index of the first row added.

private void dataGridView1_NewRowNeeded(object sender,
    DataGridViewRowEventArgs e)
{
    newRowNeeded = true;
}

private void dataGridView1_RowsAdded(object sender,
     DataGridViewRowsAddedEventArgs e)
{
    if (newRowNeeded)
    {
        newRowNeeded = false;
        numberOfRows = numberOfRows + 1;
    }
}

will fetch you the exact row refer msdn rowadded link

0
votes

Depending on the operations you wish to perform after binding you could use Control.BindingContextChanged event to iterate on the grid rows:

private void dataGridView1_BindingContextChanged(object sender, EventArgs e) 
{
    foreach (var row in dataGridView1.Rows) {

    }
}

If it's not working could you say what exactly are you trying to accomplish after binding?