private void SetInitialCourse()
{
//Create DataTable
DataTable dt = new DataTable();
DataRow dr = null;
//Add initail values to DataTable
dt.Columns.Add(new DataColumn("RowNumberCourse", typeof(string)));
dt.Columns.Add(new DataColumn("Column1Course", typeof(string)));
dt.Columns.Add(new DataColumn("Column2Course", typeof(string)));
//dt.Columns.Add(new DataColumn("Column3", typeof(string)));
dr = dt.NewRow();
dr["RowNumberCourse"] = 1;
dr["Column1Course"] = string.Empty;
dr["Column2Course"] = string.Empty;
//dr["Column3"] = string.Empty;
dt.Rows.Add(dr);
dr = dt.NewRow();
//Store the DataTable in ViewState
ViewState["CurrentTableCourse"] = dt;
GV_EnterCourseMarks.DataSource = dt;
GV_EnterCourseMarks.DataBind();
}
//add course-marks
private void AddNewRowToCourse()
{
int rowIndex = 0;
if (ViewState["CurrentTableCourse"] != null)
{
//create new datatable, cast datatable of viewstate
DataTable dtCurrentTable = (DataTable)ViewState["CurrentTableCourse"];
DataRow drCurrentRow = null;
if (dtCurrentTable.Rows.Count > 0)
{
for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
{
//extract the values
DropDownList courseList = (DropDownList)GV_EnterCourseMarks.Rows[rowIndex].Cells[1].FindControl("DL_Course");
TextBox marks = (TextBox)GV_EnterCourseMarks.Rows[rowIndex].Cells[2].FindControl("TB_EnterMarks");
drCurrentRow = dtCurrentTable.NewRow();
drCurrentRow["RowNumberCourse"] = i + 1;
dtCurrentTable.Rows[i - 1]["Column1Course"] = courseList.Text;
dtCurrentTable.Rows[i - 1]["Column2Course"] = marks.Text;
rowIndex++;
}
dtCurrentTable.Rows.Add(drCurrentRow);
ViewState["CurrentTableCourse"] = dtCurrentTable;
GV_EnterCourseMarks.DataSource = dtCurrentTable;
GV_EnterCourseMarks.DataBind();
}
}
else
{
Response.Write("ViewState is null");
}
//Set Previous Data on Postbacks
SetPreviousCourseData();
}
//remove course-marks
protected void Remove_Btn_Click(object sender, EventArgs e)
{
if (ViewState["CurrentTableCourse"] != null)
{
//create new datatable, cast datatable of viewstate
DataTable dtCurrentTable = (DataTable)ViewState["CurrentTableCourse"];
DataRow drCurrentRow = null;
int rowIndex = 0;
if (dtCurrentTable.Rows.Count > 1)
{
for (int i = 1; i <= dtCurrentTable.Rows.Count; i++)
{
//extract the values
DropDownList courseList = (DropDownList)GV_EnterCourseMarks.Rows[rowIndex].Cells[1].FindControl("DL_Course");
TextBox marks = (TextBox)GV_EnterCourseMarks.Rows[rowIndex].Cells[2].FindControl("TB_EnterMarks");
drCurrentRow = dtCurrentTable.NewRow();
drCurrentRow["RowNumberCourse"] = i;
dtCurrentTable.Rows[i - 1]["Column1Course"] = courseList.Text;
dtCurrentTable.Rows[i - 1]["Column2Course"] = marks.Text;
rowIndex++;
}
dtCurrentTable.Rows[rowIndex - 1].Delete();
ViewState["CurrentTableCourse"] = dtCurrentTable;
GV_EnterCourseMarks.DataSource = dtCurrentTable;
GV_EnterCourseMarks.DataBind();
}
}
SetPreviousCourseData();
}
//Delete an existing Row
protected void GV_EnterCourseMarks_RowDeleting(object sender, GridViewDeleteEventArgs e)
{
GV_EnterCourseMarks.DeleteRow(e.RowIndex);
SetPreviousCourseData();
}
