I have two DropDownLists and a Gridview control in my aspx page. All the columns of gridview are dynamically generated according to user selection from Dropdownlists.
The Gridview Contains 2 BoundField and N templated fields Containing Checkboxes. The BoundFields are constant and the number of templated fields vary according to dropdownlist selection. The Checkboxes are created using Itemplate.
Now I need to Check Uncheck all checkboxs of a gridview column when Checkbox in the Gridview Header is checked.
I added a CheckedChanged event to Itemplate it is not calling that method also. Please help me. Here is my Code:
Default.aspx-
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="smgr" runat="server">
</asp:ScriptManager>
<div class="col-md-12 panel-info">
<div class="content-box-header panel-heading">
Employee Salary Structure
</div>
<div class="content-box-large">
<div class="row">
<div class="col-sm-3">
<b>Company:</b> 
<asp:DropDownList ID="ddlcompany" runat="server" Height="20px" Width="70%">
<asp:ListItem Text="All">All</asp:ListItem>
</asp:DropDownList>
</div>
<div class="col-sm-4">
<b>Allowance Group:</b> 
<asp:DropDownList ID="ddlallowancegroup" runat="server" Height="20px"
Width="60%" onselectedindexchanged="ddlallowancegroup_SelectedIndexChanged">
<asp:ListItem Text="All">All</asp:ListItem>
</asp:DropDownList>
</div>
<asp:ImageButton ID="btnsearch" runat="server" ImageUrl="~/Admincontrol/Images/Search.png"
OnClick="btnsearch_Click" />
<asp:ImageButton ID="btnclear" runat="server" ImageUrl="~/Admincontrol/Images/Clear.png" />
</div>
<hr style="border: 1px solid #c9c9c9" />
<div class="row">
<div class="col-sm-10">
<asp:Label ID="hndId" Visible="false" runat="server"></asp:Label>
<asp:GridView ID="gvEmpSalaryStructure" Width="100%" CssClass="grdview" runat="server"
BorderColor="White" GridLines="Both" ForeColor="#333333"
CellSpacing="1" CellPadding="3" AllowSorting="true" AutoGenerateColumns="False"
OnRowCommand="gvEmpSalaryStructure_RowCommand">
<FooterStyle BackColor="#507CD1" ForeColor="White" Font-Bold="True"></FooterStyle>
<Columns>
</Columns>
<RowStyle BackColor="#EFF3FB" />
<EmptyDataTemplate>
<div style="text-align: left; border: 0px">
<strong>No Data Available...</strong>
</div>
</EmptyDataTemplate>
<EditRowStyle BackColor="Black" />
<SelectedRowStyle BackColor="#D1DDF1" Font-Bold="False" ForeColor="#333333" />
<PagerStyle BackColor="White" ForeColor="#2461BF" HorizontalAlign="Right" />
<HeaderStyle BackColor="#CCDDEF" Font-Bold="False" ForeColor="Black" VerticalAlign="Middle" HorizontalAlign="Center"/>
<AlternatingRowStyle BackColor="White" CssClass="odd" />
<PagerSettings FirstPageText="First"
LastPageText="Last" Mode="NumericFirstLast"
NextPageText="Next" PreviousPageText="Prev" />
</asp:GridView>
</div>
Default.aspx.cd(Code-Behind):
Method for getting No. of Checkbox columns by Dropdownlist selection-
private DataTable GetAllowanceGroup()
{
string hndID = ddlallowancegroup.SelectedValue;
DataSet ds = new DataSet();
DataTable dt = new DataTable();
if (ddlallowancegroup.SelectedValue == "All")
{
ds = employee.GetDistinctvalues("AllowanceName", "tbl_Pay_Allowances");
dt = ds.Tables[0];
return dt;
}
else
{
ds = allowances.getDistinctAllowanceName(Convert.ToInt32(hndID));
dt = ds.Tables[0];
return dt;
}
}
Creating Gridview Template-
private void CreateGridColumns()
{
gvEmpSalaryStructure.Columns.Clear();
BoundField empid = new BoundField();
empid.HeaderText = "Emp ID";
empid.DataField = "EmpID";
empid.Visible = false;
empid.ItemStyle.Width = Unit.Percentage(30);
gvEmpSalaryStructure.Columns.Add(empid);
BoundField empname = new BoundField();
empname.HeaderText = "Emp Name";
empname.DataField = "EmpName";
empname.ItemStyle.Width = Unit.Percentage(30);
empname.ItemStyle.HorizontalAlign = HorizontalAlign.Left;
gvEmpSalaryStructure.Columns.Add(empname);
var tblAllowanceGroup = GetAllowanceGroup();
foreach (DataRow row in tblAllowanceGroup.Rows)
{
String AllowanceGroupName = row.Field<String>("AllowanceName");
TemplateField field = new TemplateField();
field.ItemTemplate = new GridViewCheckBoxTemplate(DataControlRowType.DataRow, AllowanceGroupName, AllowanceGroupName, "CheckBox");
field.HeaderTemplate = new GridViewCheckBoxTemplate(DataControlRowType.Header, AllowanceGroupName, AllowanceGroupName, "CheckBox");
field.ItemStyle.Width = 70;
field.ItemStyle.HorizontalAlign = HorizontalAlign.Center;
gvEmpSalaryStructure.Columns.Add(field);
}
Itemplate() Method-
public class GridViewCheckBoxTemplate : ITemplate
{
private DataControlRowType templateType;
private string columnName;
private string columnNameBinding;
private string controlType;
public GridViewCheckBoxTemplate(DataControlRowType type, string colname, string colNameBinding, string ctlType)
{
templateType = type;
columnName = colname;
columnNameBinding = colNameBinding;
controlType = ctlType;
}
public void InstantiateIn(System.Web.UI.Control container)
{
switch (templateType)
{
case DataControlRowType.Header:
if(controlType == "CheckBox")
{
var chb1 = new CheckBox();
chb1.Text = columnName + " ";
chb1.ID = columnName;
chb1.TextAlign = TextAlign.Left;
chb1.CheckedChanged+= new EventHandler(this.chb1_CheckedChanged);
chb1.LabelAttributes.CssStyle.Add("align", "center");
container.Controls.Add(chb1);
}
else
{
Literal lc = new Literal();
lc.Text = columnName;
container.Controls.Add(lc);
}
break;
case DataControlRowType.DataRow:
if (controlType == "Label")
{
Label lb = new Label();
lb.ID = "lb1";
lb.DataBinding += new EventHandler(this.ctl_OnDataBinding);
container.Controls.Add(lb);
}
else if (controlType == "TextBox")
{
TextBox tb = new TextBox();
tb.ID = "tb1";
tb.DataBinding += new EventHandler(this.ctl_OnDataBinding);
container.Controls.Add(tb);
}
else if (controlType == "CheckBox")
{
CheckBox cb1 = new CheckBox();
cb1.ID = columnName;
cb1.DataBinding += new EventHandler(this.ctl_OnDataBinding);
container.Controls.Add(cb1);
}
else if (controlType == "HyperLink")
{
HyperLink hl = new HyperLink();
hl.ID = "hl1";
hl.DataBinding += new EventHandler(this.ctl_OnDataBinding);
container.Controls.Add(hl);
}
else if (controlType == "ImageButton")
{
ImageButton ib = new ImageButton();
ib.ImageUrl = "~/Admincontrol/Images/view1.gif";
ib.CommandName = "Select";
ib.ID = "iSelect";
container.Controls.Add(ib);
}
break;
default:
break;
}
}
public void ctl_OnDataBinding(object sender, EventArgs e)
{
if (sender.GetType().Name == "Label")
{
Label lb = (Label)sender;
GridViewRow container = (GridViewRow)lb.NamingContainer;
lb.Text = ((DataRowView)container.DataItem)[columnNameBinding].ToString();
}
else if (sender.GetType().Name == "TextBox")
{
TextBox tb = (TextBox)sender;
GridViewRow container = (GridViewRow)tb.NamingContainer;
tb.Text = ((DataRowView)container.DataItem)[columnNameBinding].ToString();
}
else if (sender.GetType().Name == "CheckBox")
{
CheckBox cb = (CheckBox)sender;
GridViewRow container = (GridViewRow)cb.NamingContainer;
object dataValue = ((DataRowView)container.DataItem)[columnNameBinding];
cb.Checked = dataValue != DBNull.Value && (bool)dataValue;
}
else if (sender.GetType().Name == "HyperLink")
{
HyperLink hl = (HyperLink)sender;
GridViewRow container = (GridViewRow)hl.NamingContainer;
hl.Text = ((DataRowView)container.DataItem)[columnNameBinding].ToString();
hl.NavigateUrl = ((DataRowView)container.DataItem)[columnNameBinding].ToString();
}
else if (sender.GetType().Name == "ImageButton")
{
ImageButton ib = (ImageButton)sender;
GridViewRow container = (GridViewRow)ib.NamingContainer;
ib.ImageUrl = ((DataRowView)container.DataItem)[columnNameBinding].ToString();
}
}
public void chb1_CheckedChanged(object sender, EventArgs e)
{
GridViewRow row = ((GridViewRow)((CheckBox)sender).NamingContainer);
int index = row.RowIndex;
if (cb.Checked)
{
}
}
}
Page_Load():
protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) {
DataSet dscompany = new DataSet();
ddlcompany.Items.Clear();
ddlcompany.Items.Add("All");
dscompany = company.GetAllCompanymaster();
for (int i = 0; i < dscompany.Tables[0].Rows.Count; i++)
{
ddlcompany.Items.Add(new ListItem(dscompany.Tables[0].Rows[i]["CompanyFName"].ToString(), dscompany.Tables[0].Rows[i]["CompanyId"].ToString()));
}
DataSet dsallowancegroup = new DataSet();
ddlallowancegroup.Items.Clear();
ddlallowancegroup.Items.Add("All");
dsallowancegroup = allowancegroup.GetAllAllowanceGroup();
for (int i = 0; i < dsallowancegroup.Tables[0].Rows.Count; i++)
{
ddlallowancegroup.Items.Add(new ListItem(dsallowancegroup.Tables[0].Rows[i]["AllowanceGroupName"].ToString(), dsallowancegroup.Tables[0].Rows[i]["AllowanceGroupId"].ToString()));
}
GridView gvEmpSalaryStructure = new GridView();
gvEmpSalaryStructure.DataSource = null;
gvEmpSalaryStructure.DataBind();
CreateGridColumns();
BindGrid();
}
}
BindGrid() Method:
private void BindGrid()
{
var tblAllowanceGroup = GetAllowanceGroup();
DataSet dsgrid = new DataSet();
DataTable dtgrid = new DataTable();
var empRow = dtgrid.NewRow();
dtgrid.Columns.Add("EmpID");
dtgrid.Columns.Add("EmpName");
foreach (DataRow row in tblAllowanceGroup.Rows)
{
String AllowanceGroupName = row.Field<String>("AllowanceName");
dtgrid.Columns.Add(AllowanceGroupName, typeof(bool));
}
dtgrid.Columns.Add("");
this.GenerateFilterExpression();
dsgrid = employee.GetSearchEmployee(FilterExpression);
if (dsgrid.Tables[0].Rows.Count > 0)
{
for (int i = 0; i <= dsgrid.Tables[0].Rows.Count - 1; i++)
{
DataRow row = dtgrid.NewRow();
row["EmpID"] = dsgrid.Tables[0].Rows[i]["EmployeeId"].ToString();
row["EmpName"] = dsgrid.Tables[0].Rows[i]["EmployeeName"].ToString();
foreach (DataRow row1 in tblAllowanceGroup.Rows)
{
row[row1.Field<String>("AllowanceName")] = 0;
}
dtgrid.Rows.Add(row);
}
}
DataView dv = dtgrid.DefaultView;
gvEmpSalaryStructure.DataSource = dv;
gvEmpSalaryStructure.DataBind();
gvEmpSalaryStructure.HeaderRow.HorizontalAlign = HorizontalAlign.Center;
}
Varying No. of Rows:
private void GenerateFilterExpression()
{
if (ddlcompany.SelectedItem.Text != "All")
{
FilterExpression = FilterExpression + " CompanyId=" + ddlcompany.SelectedValue + " and ";
}
else
{
FilterExpression = FilterExpression + "";
}
if (ddlallowancegroup.SelectedItem.Text != "All")
{
FilterExpression = FilterExpression + " AllowanceGroupId=" + ddlallowancegroup.SelectedValue + " and ";
}
else
{
FilterExpression = FilterExpression + "";
}
FilterExpression = FilterExpression + " EmployeeId > 0 and EmployeeCode != '0'";
}
What I have tried:
I tried to add a event to Checkbox in Itemplate header. but it event is not called.
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