What is DataGridView.Rows.Clear()?

Question

I\'m adding programatically some rows in a datagridview every certain time. I want to view in the datagridview the status of certain github repositories, such as if are online,

Answer 1

There are serial ways for choice when you really want to clear the data of DataGridView Control.

1.Use for loop to clear the row data one by one.

 for (int i = 0; i < dataGridView1.RowCount; i++)
        {
            dataGridView1.Rows.Remove(dataGridView1.Rows[0]);

        } 

2.Set DataSource property to NULL directly.

 DataGridView.DataSource＝null;

If you want to bind DataSet to this control, you’d better setting DataSet to NULL first.

DataSet DataSet1＝new DataSet();
DataSet1.clear();

3.Above way may remove all of Tables inside in specified DataSet,so you'd better removing its Table separately.

DataSet ds = new DataSet();

DataTable dt = new DataTable();

dt.Columns.Add("val", typeof(int));

dt.Columns.Add("name", typeof(string));

dt.Rows.Add(1, "good");

ds.Tables.Add(dt);

dt.TableName = "test";

dataGridView1.DataSource = ds.Tables[0];

Hence, you can use following code to clear specified table.

ds.Tables[0].Clear();