How can I clear rows in DataGridView with C#?

Question

Following Error in this line.

datagridview1.Rows.Clear()

but this line gives error:

Cannot clear this list.

Answer 1

private void button_Limpar_Click(object sender, EventArgs e)
{
    DataTable DT = (DataTable)dataGridView_Cidade.DataSource;
    if (DT != null)
        DT.Clear();
}
#endregion

Answer 2

You can use this simple method:

First clear your DataTable and then refresh your DataGridView

dataTable.Clear();
dataGridView.Refresh();

Hope this help

Answer 3

First clear DataSource and then clear DataGridView

in VB

 datagridview1.DataSource = Nothing
 datagridview1.Rows.Clear()

hope help

Answer 4

Easy solution is to clear the DataSet. ds.Clear();

Answer 5

foreach (DataGridViewRow item in this.datagridview.Rows)
{
    datagridview.Rows.RemoveAt(item.Index);
}

Answer 6

I had the same problem I tried with many solutions.

In the end I realized that we can't clear the DataGridView if we use it's property "DGV.Datasource" because DGV takes its data from the dataset so you need to clear the DataTable rows

Dataset.Tables["TableName"].Rows.Clear();

If you use this function in the Load of the Form you need to add a condition

if (DataSet.Tables["TableName"] !=null)    
    Dataset.Tables["TableName"].Rows.Clear();

or you will get this error

Object reference not set to an instance of an object.