problem in binding data to gridview

Question

The below is my code for binding data to gridview. This method for creating datagridview column Collapse | Copy Code public void designgrid() { DataGridViewColumn firstcolumn=dataGridView1.Columns[1]; DataGridViewCell cell=new DataGridViewTextBoxCell(); firstcolumn.CellTemplate=cell; firstcolumn.HeaderText = "AdmissionNumber"; firstcolumn.Width = 50; DataGridViewColumn secondcolumn = dataGridView1.Columns[2]; DataGridViewCell cell1 = new DataGridViewTextBoxCell(); secondcolumn.CellTemplate = cell1; secondcolumn.HeaderText = "StudentName"; secondcolumn.Width = 80; DataGridViewColumn Thirdcolumn = dataGridView1.Columns[3]; DataGridViewCell cell2 = new DataGridViewTextBoxCell(); Thirdcolumn.CellTemplate = cell1; Thirdcolumn.HeaderText = "StanderedName"; Thirdcolumn.Width = 80; DataGridViewColumn forthcolumn = dataGridView1.Columns[4]; DataGridViewCell cell3 = new DataGridViewTextBoxCell(); forthcolumn.CellTemplate = cell3; forthcolumn.HeaderText = "RegisterNumber"; forthcolumn.Width = 50; DataGridViewColumn fifthcolumn = dataGridView1.Columns[5]; fifthcolumn = new DataGridViewComboBoxColumn(); fifthcolumn.HeaderText = "SortNo"; fifthcolumn.Width = 50; } This code for binding data to gridview Collapse | Copy Code DataTable studentbind = ibl4.studentbindforfemale(sdt); int rowcount = studentbind.Rows.Count; List no = ibl4.setnoofint(rowcount); int registerno = ibl4.getregiter(sdt); designgrid(); for(int i=0;i