Bind CheckBoxList And Get The Selected Items In ASP.NET C#

In this article we will learn how to Bind Chekbox List and get the Selected Items from List. We will make a Web application using C#. Let’s start.

1. Open Visual Studio. Select New Web Site.
   
   
   
   
2. Name it as you want. My application's name is CheckBoxList_Example.
   
   
   
3. First Of All Add Web Form. Go to Solution Explorer > Right Click on the Web Site > Select Add > Add New Item > Select > Web Form and Give the Web Form Name, My We Form Page Name Is CheckList_Page.
   
   
   
4. Add Check Box List , Label and Button On CheckList_Page.aspx Page.
   

   <asp:CheckBoxList ID="CheckboxList1" runat="server" AutoPostBack="false" Width="450px">
   </asp:CheckBoxList>
   
   <asp:Label ID="lblmsg" class="textcls" runat="server"></asp:Label>
   
   <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Show Data" />

5. Create a method for Bind the CheckBox List.
   

   protected void Bind_CheckList() // Method for Binding The Checkbox List
    {
        List<string> listContents = new List<string>();// Create a List of String Elements
        listContents.Add("DehraDun");
        listContents.Add("Shimla");
        listContents.Add("Patna");
        listContents.Add("Mumbai");
        listContents.Add("Delhi");
        listContents.Add("Goa");
        listContents.Add("Chennai");
        listContents.Add("Noida");
        listContents.Add("GuruGram");
   
        CheckboxList1.DataSource = listContents;//Set Datasource to CheckBox List
        CheckboxList1.DataBind(); // Bind the checkboxList with String List.
   
    }

6. Call this Method On PageLoad.
   

   protected void Page_Load(object sender, EventArgs e)
       {
           if (Page.IsPostBack == false)
           {
               Bind_CheckList();// Call CheckBox List Bind Method.
           }
       }

7. Get the selected Item List From CheckBoxList Items and show Selected Items List with Help of Label .
   

   protected void Button1_Click(object sender, EventArgs e)
     {
         string str = "";
   
         for(int i=0;i<CheckboxList1.Items.Count ;i++)
         {
             if(CheckboxList1.Items[i].Selected==true)// getting selected value from CheckBox List
             {
                  str += CheckboxList1.Items[i].Text  + " ," + "<br/>" ; // add selected Item text to the String .
             }
   
   
         }
         if(str!="")
         {
             str = str.Substring(0, str.Length - 7); // Remove Last "," from the string .
             lblmsg.Text = "Selected Cities are <br/><br/>" + str; // Show selected Item List by Label.
         }
     }

I hope this is helpful for developing. Thanks.