how to cnvert string to int for date???

Question

public int T_Date = 0;

private void addToolStripMenuItem_Click(object sender, System.EventArgs e)

{

try

{

DataColumn col = new DataColumn((dataGridView1.ColumnCount + 1).ToString());

//T_Date = System.DateTime.Now.ToString("dd.MM.yyyy");

//DateTime now = System.DateTime.Now;

T_Date = Convert.ToInt32(DateTime.Now);

dataGridView1.Columns.Add("Column", "T_Date");

if (dataGridView1.ColumnCount >0)

{

T_Date = 1;

}

else

{

T_Date = T_Date + 1;

}

dataGridView1.Columns[dataGridView1.RowCount - 1].CellType.IsValueType.GetType();

}

catch (Exception ex)

{

MessageBox.Show(ex.Message);

}

}

 

 

 following error found

Invalid cast from 'DateTime' to 'Int32'.