How to check if RadioButtonList / checks its selection in C #?

Question

I have a RadioButtonList that is populated from a database, users need to at least check / select one of RadioButtons. How can I make sure they check / choose RadioButton? I tried many different ways, but no luck, here is my code. I also try to warn them about turning off the radio.

I am trying to verify that the RadioButtonList is checked / selected.

if (cblstatus.SelectedItem.Value == "1") { //Create Category con.Open(); SqlCommand departament = new SqlCommand("insert into categories(ca_name, ca_number, ca_status, ca_department, ca_date, ca_time, ca_user) " + "values('" + category.Text + "', '" + number.Text + "', 'Y', '" + catdepartment.SelectedValue + "', '" + date + "', '" + time + "', '" + user + "')", con); departament.ExecuteNonQuery(); con.Close(); } else if (cblstatus.SelectedItem.Value == "2") { //Create Category con.Open(); SqlCommand departament = new SqlCommand("insert into categories(ca_name, ca_number, ca_status, ca_department, ca_date, ca_time, ca_user) " + "values('" + category.Text + "', '" + number.Text + "', 'N', '" + catdepartment.SelectedValue + "', '" + date + "', '" + time + "', '" + user + "')", con); departament.ExecuteNonQuery(); con.Close(); } else if (cblstatus. == null) { alert.InnerHtml = "<div id=\"warning\" class=\"message warning\">Warning! Please select a department.</div>" + "<script>" + "setTimeout(function () { $('#success').fadeOut(); }, 2000);" + "</script>"; } 

Answer 1

instead of doing this on your code, use the required asp.net field validator:

here is an example:

 <asp:RadioButtonList runat="server" ID="gender" RepeatDirection="Horizontal" RepeatLayout="Flow" CssClass="labels"> <asp:ListItem Text="Male" Value="Male"></asp:ListItem> <asp:ListItem Text="Female" Value="Female"></asp:ListItem> 

 <asp:RequiredFieldValidator runat="server" ID="genderRequired" Display="Dynamic" ControlToValidate="gender" ErrorMessage="This is an Error" ValidationGroup="signUp">*</asp:RequiredFieldValidator> 

in the code behind you can create an empty div and then add text to it on error, and you can use the jquery change function to further control:

 if (gender.SelectedItem.Value == "Male") { //do stuff } else if (gender.SelectedItem.Value == "Female") { //do stuff } else { errorDiv.InnerText = "Error Messeage"; } 

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.requiredfieldvalidator.aspx

Answer 2

We can use the normal RequiredFieldValidation without defining the InitialValue property

 <asp:RadioButtonList runat="server" ID="Radioyesno" RepeatDirection="Horizontal"> <asp:ListItem>Yes</asp:ListItem> <asp:ListItem>No</asp:ListItem> </asp:RadioButtonList> <asp:RequiredFieldValidator runat="server" ID="RFV123" ValidationGroup="VG1" ControlToValidate="Radioyes" ErrorMessage="PLEASE SELECT YES/NO"/> 

it works for me, not hard thinking

Answer 3

You can use this approach, but fully encode

  public bool ValidateRadioButtonList() { bool rbchecked= false; for (int i = 0; i < RadioButtonList1.Items.Count - 1; i++) { if (RadioButtonList1.Items[i].Selected==true) { rbchecked = true; } } if (rbchecked == true) { lblError.Text = string.Empty; return true; } else { lblError.Text = "Please select RadioButton!"; return false; } } 

Answer 4

.aspx:

 <asp:RadioButtonList ID="rbAny" runat="server" > <asp:ListItem Value="rb1" Text="something1"></asp:ListItem> <asp:ListItem Value="rb2" Text="something2"></asp:ListItem> <asp:ListItem Value="rb3" Text="something3"></asp:ListItem> </asp:RadioButtonList> 

.aspx.cs:

add / paste values ​​in ViewState (e.g. by clicking buttons):

 protected void btnSend_Click(object sender, EventArgs e) { foreach (ListItem r in rbAny.Items) if (r.Selected) ViewState["anyValue"] = r.Text; } 

reading value from ViewState:

 protected void btnShow_Click(object sender, EventArgs e) { StringBuilder str = new StringBuilder(); str.Append("anyValue: " + ViewState["anyValue"]); someLabel.Text = str.ToString(); } 

Answer 5

 Imports System.IO Imports System.Text Imports System Public Class WebForm1 Inherits System.Web.UI.Page Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load End Sub 'Protected Sub Calendar1_SelectionChanged(sender As Object, e As EventArgs) ' TextBox1.Text = Calendar1.SelectedDate.ToShortDateString() ' Calendar1.Visible = False 'End Sub 'Protected Sub LinkButton1_Click(sender As Object, e As EventArgs) ' 'Calendar1.Visible = True 'End Sub 'Protected Sub LinkButton2_Click(sender As Object, e As EventArgs) ' Calendar2.Visible = True 'End Sub 'Protected Sub Calendar2_SelectionChanged(sender As Object, e As EventArgs) ' TextBox2.Text = Calendar2.SelectedDate.ToShortDateString() ' Calendar2.Visible = False 'End Sub Public Sub DownloadCSV() Dim csvPath1 As String = "D:\CSVFile1.csv" 'Download and read all Text within the uploaded Text file. Dim csvContentStr1 As String = File.ReadAllText(csvPath1) Dim split As String() = csvContentStr1.Split(","c) 'Here you can see the output as CSV content. 'Response.Write(csvContentStr) End Sub Public Sub UploadCSV() Dim csvContent As New StringBuilder() DownloadCSV() Dim dt1 As DateTime = Convert.ToDateTime(TextBox1.Text) Dim dt2 As DateTime = Convert.ToDateTime(TextBox2.Text) Dim dt3 As TimeSpan = dt2.Subtract(dt1) Dim NoOfDays As Integer = dt3.Days + 1 'TextBox3.Text = NoOfDays.ToString Dim index As DateTime = Convert.ToDateTime(TextBox1.Text) While index <= Convert.ToDateTime(TextBox2.Text) If index.DayOfWeek = DayOfWeek.Saturday OrElse index.DayOfWeek = DayOfWeek.Sunday Then NoOfDays = NoOfDays - 1 End If index = index.AddDays(1) End While Dim a1 As String = TextBox1.ToString() Dim b1 As String = TextBox2.ToString() Dim c1 As String = RadioButtonList1.Text.ToString() Dim d1 As String = TextBox3.ToString() Dim z1 As String = TextBox1.Text + "," + TextBox2.Text + "," + RadioButtonList1.Text + "," + TextBox3.Text + "," + NoOfDays.ToString 'csvContent.AppendLine("From Date,To Date,Laeve Type,Reason") csvContent.AppendLine(z1) Dim csvPath As String = "D:\CSVFile2.csv" ' Save or upload CSV format File (.csv) File.AppendAllText(csvPath, csvContent.ToString()) End Sub Protected Sub Button1_Click(sender As Object, e As EventArgs) If Page.IsValid Then Dim a1 As String = TextBox1.ToString() Dim b1 As String = TextBox2.ToString() Dim c1 As String = RadioButtonList1.Text.ToString() Dim d1 As String = TextBox3.ToString() UploadCSV() DownloadCSV() End If End Sub Protected Sub Button2_Click(sender As Object, e As EventArgs) End Sub End Class 

Aspx Code

 <%@ Page Title="" Language="vb" AutoEventWireup="false" MasterPageFile="~/Site1.Master" CodeBehind="WebForm1.aspx.vb" Inherits="Leave12.WebForm1" %> <asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server"> </asp:Content> <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"> <table> <tr> <%-- <td> <asp:LinkButton ID="LinkButton1" runat="server" OnClick="LinkButton1_Click" >Select From Date.....</asp:LinkButton> </td> <td> <asp:Calendar ID="Calendar1" runat="server" Visible="false" OnSelectionChanged="Calendar1_SelectionChanged" ></asp:Calendar> </td> <td> <asp:TextBox ID="TextBox1" ReadOnly="true" runat="server"></asp:TextBox> </td>--%> <td> <asp:Label ID="Label1" runat="server" Text="Please enter From Date"></asp:Label> </td> <td> <asp:TextBox ID="TextBox1" TextMode="Date" runat="server"></asp:TextBox> </td> <td> <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="Please enter From Date" Display="Dynamic" ControlToValidate="TextBox1"></asp:RequiredFieldValidator> </td> </tr> <tr> <%-- <td> <asp:LinkButton ID="LinkButton2" runat="server" OnClick="LinkButton2_Click">Select To Date.....</asp:LinkButton> </td> <td> <asp:Calendar ID="Calendar2" runat="server" Visible="false" OnSelectionChanged="Calendar2_SelectionChanged" ></asp:Calendar> </td> <td> <asp:TextBox ID="TextBox2" ReadOnly="true" runat="server"></asp:TextBox> </td>--%> <%--<td> <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ErrorMessage="Please enter To Date" Display="Dynamic" ControlToValidate="TextBox2"></asp:RequiredFieldValidator> </td>--%> <td> <asp:Label ID="Label2" runat="server" Text="Please enter To Date"></asp:Label> </td> <td> <asp:TextBox ID="TextBox2" TextMode="Date" runat="server"></asp:TextBox> </td> <td> <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ErrorMessage="Please enter To Date" Display="Dynamic" ControlToValidate="TextBox2"></asp:RequiredFieldValidator> </td> <td> <asp:CompareValidator ID="CompareValidator1" runat="server" ErrorMessage="To Date should be greater than From Date" Display="Dynamic" Operator="GreaterThanEqual" ControlToCompare="TextBox1" ControlToValidate="TextBox2"></asp:CompareValidator> </td> </tr> <tr> <td> <asp:Label ID="Label3" runat="server" Text="Please select Leave Type"></asp:Label> </td> <td> <asp:RadioButtonList RepeatDirection="Horizontal" ID="RadioButtonList1" runat="server" > <asp:ListItem Selected="True" >Casual Leave</asp:ListItem> <asp:ListItem>Sick Leave</asp:ListItem> <asp:ListItem>Earned Leave</asp:ListItem> </asp:RadioButtonList> </td> </tr> <%--<tr> <td> <asp:Label ID="Label2" runat="server" Text="Reason"></asp:Label> </td> <td> <asp:TextBox ID="TextBox3" TextMode="MultiLine" Rows="5" Columns="50" runat="server"></asp:TextBox> </td> <td> <asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" ErrorMessage="Please select Reason" ControlToValidate="TextBox3" Display="Dynamic"></asp:RequiredFieldValidator> </td> </tr>--%> <tr> <td> <asp:Label ID="Label4" runat="server" Text="Reason"></asp:Label> </td> <td> <asp:TextBox ID="TextBox3" TextMode="MultiLine" MaxLength="250" Rows="5" Columns="50" runat="server"></asp:TextBox> </td> <td> <asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" ErrorMessage="Please provide reason for leave" Display="Dynamic" ControlToValidate="TextBox3"></asp:RequiredFieldValidator> </td> <td> <asp:RegularExpressionValidator ID="RegularExpressionValidator1" ValidationExpression="^[\s\S]{0,100}$" runat="server" ErrorMessage="Please enter maximum of 250 characters" Display="Dynamic" ControlToValidate="TextBox3"></asp:RegularExpressionValidator> </td> </tr> <tr> <td> <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Submit" /> </td> <td> <asp:Button ID="Button2" runat="server" OnClick="Button2_Click" Text="Reset" /> </td> </tr> </table> </asp:Content>