checkboxlist

Hi,

You can use the following code to count the total number of checkboxes in the checkboxlist have been checked.

protectedvoid Button1_Click(object sender, EventArgs e)
{
int numSelected = 0;
foreach (ListItem li in CheckBoxList1.Items)
{
if (li.Selected)
{
numSelected = numSelected + 1;
}
}
Response.Write("Total Number Of CheckBoxes Selected:");
Response.Write(numSelected);
}

Let me know if u have any doubts.

Hi,

Use the following code to solve this. You must use this property AutoPostBack="true". Otherwise postback will not happen.

<form id="form1" runat="server">

<div>

<asp:CheckBoxList ID="cblTest" AutoPostBack="true" runat="server" OnSelectedIndexChanged="cblTest_SelectedIndexChanged" >

<asp:ListItem Text="aaa" Value="aaa">asp:ListItem>

<asp:ListItem Text="bbb" Value="bbb">asp:ListItem>

<asp:ListItem Text="ccc" Value="ccc">asp:ListItem>

asp:CheckBoxList><br />

<asp:Label ID="lblAlertMsg" runat="server" ForeColor="red">asp:Label>

div>

form>

protected void cblTest_SelectedIndexChanged(object sender, EventArgs e)

{

int selectedItemCnt = 0;

lblAlertMsg.Text = "";

for (int i = 0; i < cblTest.Items.Count; i++)

{

if (cblTest.Items[i].Selected)

selectedItemCnt += 1;

}

if (selectedItemCnt > 1)

lblAlertMsg.Text = "You have selected " + selectedItemCnt.ToString() + " items.";

}