Find CheckBoxList Item By Value
asp.net checkboxlist web server control allow developers to render a multi selection checkbox group
in web browser. checkboxlist display list items. an Items collection hold all the ListItem
objects in checkboxlist control. each ListItem object can have a Text and a Value property.
ListItem Text property text display in web browser and Value property text is associated
with ListItem object as additional information.
sometimes a checkboxlist contains many items and we need to find specific item from the list. the following example c# code demonstrate us how can we find a list item from checkboxlist by item value programmatically at run time.
ListItemCollection class FindByValue method search the collection for a item that contains specified value. FindByValue method require a string parameter that contains the value of specified item.
sometimes a checkboxlist contains many items and we need to find specific item from the list. the following example c# code demonstrate us how can we find a list item from checkboxlist by item value programmatically at run time.
ListItemCollection class FindByValue method search the collection for a item that contains specified value. FindByValue method require a string parameter that contains the value of specified item.
CheckBoxListItemFindByValue.aspx
<%@ Page Language="C#" %>
<!DOCTYPE html>
<script runat="server">
protected void Button1_Click(object sender, System.EventArgs e)
{
string searchText = TextBox1.Text.ToString();
if (CheckBoxList1.Items.FindByValue(searchText) != null)
{
Label1.Text = "Item Found, Value: " + searchText;
CheckBoxList1.Items.FindByValue(searchText).Selected = true;
}
else
{
Label1.Text = "Item not Found, Value: " + searchText;
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>How to find list item by value in CheckBoxList, FindByValue()</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:Red">CheckBoxList example: Find By Value</h2>
<asp:Label
ID="Label1"
runat="server"
Font-Bold="true"
ForeColor="Teal"
Font-Size="Large"
>
</asp:Label>
<br /><br />
<asp:Label
ID="Label2"
runat="server"
Text="Color List"
Font-Bold="true"
ForeColor="DarkGreen"
>
</asp:Label>
<br />
<asp:CheckBoxList
ID="CheckBoxList1"
runat="server"
BackColor="DarkGreen"
ForeColor="FloralWhite"
>
<asp:ListItem Value="1">MediumOrchid</asp:ListItem>
<asp:ListItem Value="2">MediumPurple</asp:ListItem>
<asp:ListItem Value="3">MidnightBlue</asp:ListItem>
<asp:ListItem Value="4">MintCream</asp:ListItem>
<asp:ListItem Value="5">Moccasin</asp:ListItem>
<asp:ListItem Value="6">NavajoWhite</asp:ListItem>
</asp:CheckBoxList>
<br /><br />
<asp:Label
ID="Label3"
runat="server"
ForeColor="SeaGreen"
Text="Item Value"
>
</asp:Label>
<asp:TextBox
ID="TextBox1"
runat="server"
BackColor="SeaGreen"
ForeColor="Snow"
>
</asp:TextBox>
<br />
<asp:Button
ID="Button1"
runat="server"
Text="Find Item"
Font-Bold="true"
ForeColor="SeaGreen"
OnClick="Button1_Click"
/>
</div>
</form>
</body>
</html>
