DataGridView.Clear()

Question

Here comes the trouble. I want to delete all rows from datagridview. This how i add rows:

private void ReadCompleteCallback(object clientHandle, Opc.Da.ItemV         


        

Answer 1

Try this Code

private void button_Click(object sender, EventArgs e) {
    if (this.dgInv.DataSource != null) {
        this.dgInv.DataSource = null;
    } else {
        this.dgInv.Rows.Clear();
    }
}

Answer 2

If you want clear a dataGridView not binded to DataSource but manually loaded you can use this simple code:

datagridview.Rows.Clear();
datagridview.Columns.Clear();

Answer 3

all you need to do is clear your datatable before you fill it... and then just set it as you dgv's datasource

Answer 4

I don't like messing with the DataSource personally so after discussing the issue with an IT friend I was able to discover this way which is simple and doesn't effect the DataSource. Hope this helps!

foreach (DataGridViewRow row in dataGridView1.Rows) 
{
    foreach (DataGridViewCell cell in row.Cells)
    {
        cell.Value = "";
    }
}

Answer 5

Simply if your are trying to rebind your Data Grid View just code this:

DataGridView1.DataSource = DataSet.Tables["TableName"];

OR

DataGridView.DataSource = DataTable;

else if you trying to to clear your Data Grid View just code this:

DataGridView.DataSource = null;
DataGridView.Rows.Clear();
DataGridView.Refresh();

and add any method or event to bind Data Grid View Again below this line of code....

Answer 6

Basically below code line is only useful in data binding scenarios

datagridview.DataSource = null; 

otherwise below is the used when no data binding and datagridview is populated manually

dataGridView1.Rows.Clear();
dataGridView1.Refresh();

So, check first what you are doing.