User1552454131 posted
Hello friends,
I have a requirement, i have checkboxlist from which i will check some items, depending on the number of items checked in the checkboxlist i have
to create same number of dropdownlist dynamically with value binding from datatable, i have created one, but the problem which i am facing on postback if i dont regenerate the control on pageload than control is lost, if regenerate the control than the selected
value is lost, i am posting my code below, any immediate help on this will be appericiated.
<asp:PlaceHolder runat="server" ID="pldMultiYearColumns" ></asp:PlaceHolder>
private void MultiYearColumnControl()
{
if (chkMultiYear != null)
{
//Add New Row
TableRow trMain = new TableRow();
int cnt = 0;
foreach (ListItem itemMultiYearSelected in chkMultiYear.Items)
{
if (itemMultiYearSelected.Selected)
{
ITReturnBLL itReturnBLL = new ITReturnBLL();
DataTable _dtReturnTable = new DataTable();
//Get the Selected ComputationId
int _computationId = Convert.ToInt32(itemMultiYearSelected.Value);
_dtReturnTable = itReturnBLL.GetTableGeneratedForReturn(_computationId);
//Create a Datatable to Hold the ColumnName From the Return DataTable
DataTable dtCol = GetTableWithColumnName(_dtReturnTable, itemMultiYearSelected.Text);
//Create an Instance For the RadComboBoxList
DropDownList drpMutiYearCol = new DropDownList();
drpMutiYearCol.ID = "ddlDynamic-" + Convert.ToString(cnt);
drpMutiYearCol.Width = new Unit("250px");
drpMutiYearCol.AutoPostBack = true;
drpMutiYearCol.DataSource = dtCol;
//drpMutiYearCol.DataTextField = "ColumnName";
//drpMutiYearCol.DataValueField = "FinancialYear";
//drpMutiYearCol.DataBind();
drpMutiYearCol.Items.Insert(0, new ListItem("--Select--", ""));
foreach (DataRow row in dtCol.Rows)
{
int index = 1;
drpMutiYearCol.Items.Insert(index, new ListItem(Convert.ToString(row["ColumnName"]), Convert.ToString(row["FinancialYear"])));
index = index + 1;
}
//drpMutiYearCol.SelectedIndexChanged += drpMutiYearCol_SelectedIndexChanged;
drpMutiYearCol.SelectedIndexChanged += drpMutiYearCol_SelectedIndexChanged;
//drpMutiYearCol.TextChanged += drpMutiYearCol_TextChanged;
pldMultiYearColumns.Controls.Add(drpMutiYearCol);
cnt = cnt + 1;
_FlagIsGenerated = "T";
}
}
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (_FlagIsGenerated == "T")
{
MultiYearColumnControl();
}
}
protected void btnGetColumnList_Click(object sender, EventArgs e)
{
MultiYearColumnControl();
}
protected void drpMutiYearCol_SelectedIndexChanged(object sender, EventArgs e)
{
MultiYearColumnControl();
//Get the Dropdownlist which raises the event
DropDownList drp = (DropDownList)sender;
//Add the selected value and text to the dataTabel
if (_dtMultiYearReport.Columns.Count == 0)
{
DataColumn colFY = new DataColumn("FinancialYear", typeof(string));
DataColumn colColname = new DataColumn("ColumnName", typeof(string));
DataColumn colComputationID = new DataColumn("ComputationID", typeof(int));
DataColumn colParticulars = new DataColumn("Particulars", typeof(string));
DataColumn colAmount = new DataColumn("Amount", typeof(Double));
_dtMultiYearReport.Columns.Add(colFY);
_dtMultiYearReport.Columns.Add(colColname);
_dtMultiYearReport.Columns.Add(colComputationID);
_dtMultiYearReport.Columns.Add(colParticulars);
_dtMultiYearReport.Columns.Add(colAmount);
}
//Add the rows to the Table
DataRow row = _dtMultiYearReport.NewRow();
row["FinancialYear"] = Convert.ToString(drp.SelectedValue);
row["ColumnName"] = Convert.ToString(drp.SelectedItem);
ListItem listItem = this.chkMultiYear.Items.FindByText(drp.SelectedValue);
row["ComputationID"] = Convert.ToString(listItem.Value);
//Add column to the DataTable
_dtMultiYearReport.Rows.Add(row);
_FlagIsGenerated = "T";
}
Thanks and Regards
Harnek Singh
