How do you validate checkbox/radiobutton lists? will it be like normal validation?
21334929 0 Newbie Poster
Sanchit_Sahu
yes...it does work in the same manner
21345572 0 Newbie Poster
checkboxlist validation
<%@ Register TagPrefix="CustomValidators" Namespace="CustomValidators"
Assembly="filename_of_DLL_file" %>
<HTML>
<body>
<form runat="server">
<asp:CheckBoxList id="CBList" runat="server">
<asp:ListItem Value="Hello" />
<asp:ListItem Value="World!" />
</asp:CheckBoxList>
<CustomValidators:RequiredFieldValidatorForCheckBoxLists
id="reqCBList" runat="server" ControlToValidate="CBList"
ErrorMessage="Please select at least one checkbox..." />
<asp:Button id="Button1" runat="server" Text="Button" />
</form>
</body>
</HTML>
21345572 0 Newbie Poster
checkboxes validation
<form id="form1" runat="server">
<asp:Label ID="NameLbl" runat="server" Text="Label"></asp:Label><asp:RequiredFieldValidator
ID="NameRFV" runat="server" ErrorMessage="NameTxtBox"></asp:RequiredFieldValidator>
<asp:TextBox ID="NameTxtBox" runat="server"></asp:TextBox>
<br />
<asp:Label ID="AliveLbl" runat="server" Text="Are you alive?"></asp:Label>
<asp:CheckBox ID="AliveChkBox" runat="server" />
<asp:Button ID="Submit" class="btn btn-primary" runat="server" Text="Submit" OnClick="Submit_Click" />
</form>
21345572 0 Newbie Poster
listboxes
<asp:ListBox ID="ListBox1" runat="server" SelectionMode = "Multiple">
<asp:ListBox ID="ListBox1" runat="server" SelectionMode = "Multiple">
<asp:ListItem Text = "Apple" Value = "1"></asp:ListItem>
<asp:ListItem Text = "Mango" Value = "2"></asp:ListItem>
<asp:ListItem Text = "Orange" Value = "3"></asp:ListItem>
</asp:ListBox>
<asp:CustomValidator ID="CustomValidator1" runat="server" ErrorMessage="*Required"
ClientValidationFunction = "ValidateListBox"></asp:CustomValidator>
<script type = "text/javascript">
function ValidateListBox(sender, args) {
var options = document.getElementById("<%=ListBox1.ClientID%>").options;
for (var i = 0; i < options.length; i++) {
if (options[i].selected == true) {
args.IsValid = true;
return;
}
}
args.IsValid = false;
}
</script>
<asp:Button ID="Button1" runat="server" Text="Button" />
21345572 0 Newbie Poster
hope this can help you...
21345572 0 Newbie Poster
radio buttons
public bool check_radiobutton(RadioButton radio1, RadioButton radio2)
{
//none of them aare selected
if ((radio1.Checked) && (radio2.Checked))
{
return false;
}
else
{
MessageBox.Show("You forgot to select a radiobutton!");
}
return true;
}
21334929 0 Newbie Poster
Thanks
21310051 0 Newbie Poster
if(RadioButtonList1.SelectedIndex > -1)
{
code you want the program to execute if a radio button is selected
}
else
{
output statement asking the user to selecct a radio button
}
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