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CheckBoxList.RepeatColumns Property

Gets or sets the number of columns to display in the CheckBoxList control.

[Visual Basic]
Public Overridable Property RepeatColumns As Integer
[C#]
public virtual int RepeatColumns {get; set;}
[C++]
public: __property virtual int get_RepeatColumns();
public: __property virtual void set_RepeatColumns(int);
[JScript]
public function get RepeatColumns() : int;
public function set RepeatColumns(int);

Property Value

The number of columns to display in the CheckBoxList control. The default is 0, which indicates this property is not set.

Exceptions

Exception Type Condition
ArgumentOutOfRangeException The number of columns is set to a negative value.

Remarks

Use this property to specify the number of columns that display items in the CheckBoxList control. If this property is not set, the CheckBoxList control displays all list items in a single column.

Example

[Visual Basic, C#, JScript] The following example demonstrates how to use the RepeatColumns property to specify that two columns are displayed in the CheckBoxList control.

[Visual Basic] 
<%@ Page Language="VB" AutoEventWireup="True" %>
<html>
<head>

<script language="VB" runat="server">

   Sub Check_Clicked(sender As Object, e As EventArgs)
      Dim i As Integer
      Message.Text = "Selected Item(s):<br><br>"
      For i=0 To checkboxlist1.Items.Count - 1
         If checkboxlist1.Items(i).Selected Then
            Message.Text += checkboxlist1.Items(i).Text + "<br>"
         End If
      Next
   End Sub

</script>
 
</head>
<body>
   
   <form action="checkboxlist.aspx" method="post" runat="server">
 
      <h3>CheckBoxList Example</h3>

      <asp:CheckBoxList id="checkboxlist1" 
           AutoPostBack="True"
           CellPadding="5"
           CellSpacing="5"
           RepeatColumns="2"
           RepeatDirection="Vertical"
           RepeatLayout="Flow"
           TextAlign="Right"
           OnSelectedIndexChanged="Check_Clicked"
           runat="server">
 
         <asp:ListItem>Item 1</asp:ListItem>
         <asp:ListItem>Item 2</asp:ListItem>
         <asp:ListItem>Item 3</asp:ListItem>
         <asp:ListItem>Item 4</asp:ListItem>
         <asp:ListItem>Item 5</asp:ListItem>
         <asp:ListItem>Item 6</asp:ListItem>
 
      </asp:CheckBoxList>
 
      <br><br>

      <asp:label id="Message" runat="server"/>
             
   </form>
          
</body>
</html>

[C#] 
<%@ Page Language="C#" AutoEventWireup="True" %>
<html>
<head>

<script language="C#" runat="server">

   void Check_Clicked(Object sender, EventArgs e) 
   {
      Message.Text = "Selected Item(s):<br><br>";
      for (int i=0; i<checkboxlist1.Items.Count; i++)
      {
         if (checkboxlist1.Items[i].Selected)
            Message.Text += checkboxlist1.Items[i].Text + "<br>";
      }
   }

</script>
 
</head>
<body>
   
   <form action="checkboxlist.aspx" method="post" runat="server">
 
      <h3>CheckBoxList Example</h3>

      <asp:CheckBoxList id="checkboxlist1" 
           AutoPostBack="True"
           CellPadding="5"
           CellSpacing="5"
           RepeatColumns="2"
           RepeatDirection="Vertical"
           RepeatLayout="Flow"
           TextAlign="Right"
           OnSelectedIndexChanged="Check_Clicked"
           runat="server">
 
         <asp:ListItem>Item 1</asp:ListItem>
         <asp:ListItem>Item 2</asp:ListItem>
         <asp:ListItem>Item 3</asp:ListItem>
         <asp:ListItem>Item 4</asp:ListItem>
         <asp:ListItem>Item 5</asp:ListItem>
         <asp:ListItem>Item 6</asp:ListItem>
 
      </asp:CheckBoxList>
 
      <br><br>

      <asp:label id="Message" runat="server"/>
             
   </form>
          
</body>
</html>

[JScript] 
<%@ Page Language="JScript" AutoEventWireup="True" %>
<html>
<head>

<script language="JScript" runat="server">

   function Check_Clicked(sender : Object, e : EventArgs) 
   {
      Message.Text = "Selected Item(s):<br><br>";
      for (var i : int = 0; i<checkboxlist1.Items.Count; i++)
      {
         if (checkboxlist1.Items[i].Selected)
            Message.Text += checkboxlist1.Items[i].Text + "<br>";
      }
   }

</script>
 
</head>
<body>
   
   <form action="checkboxlist.aspx" method="post" runat="server">
 
      <h3>CheckBoxList Example</h3>

      <asp:CheckBoxList id="checkboxlist1" 
           AutoPostBack="True"
           CellPadding="5"
           CellSpacing="5"
           RepeatColumns="2"
           RepeatDirection="Vertical"
           RepeatLayout="Flow"
           TextAlign="Right"
           OnSelectedIndexChanged="Check_Clicked"
           runat="server">
 
         <asp:ListItem>Item 1</asp:ListItem>
         <asp:ListItem>Item 2</asp:ListItem>
         <asp:ListItem>Item 3</asp:ListItem>
         <asp:ListItem>Item 4</asp:ListItem>
         <asp:ListItem>Item 5</asp:ListItem>
         <asp:ListItem>Item 6</asp:ListItem>
 
      </asp:CheckBoxList>
 
      <br><br>

      <asp:label id="Message" runat="server"/>
             
   </form>
          
</body>
</html>

[Visual Basic] 

<%@ Page Language="VB" AutoEventWireup="True" %>

<html>

<head>

   <script runat="server">

      Sub Check_Clicked(sender as Object, e As EventArgs) 

         Message.Text = "Selected Item(s):<br><br>"

         ' Iterate through the Items collection of the CheckBoxList
         ' control and display the selected items.
         Dim i As Integer

         For i=0 To checkboxlist1.Items.Count - 1

            If checkboxlist1.Items(i).Selected Then

               Message.Text &= checkboxlist1.Items(i).Text & "<br>"

            End If

         Next

      End Sub

      Sub Index_Change(sender as Object, e As EventArgs) 

         ' Set the number columns in the CheckBoxList control.
         checkboxlist1.RepeatColumns = List.SelectedIndex

      End Sub

   </script>
 
</head>

<body>
   
   <form runat="server">
 
      <h3> CheckBoxList RepeatColumns Example </h3>

      Select items from the CheckBoxList.

      <br><br>

      <asp:CheckBoxList id="checkboxlist1" 
           AutoPostBack="True"
           CellPadding="5"
           CellSpacing="5"
           RepeatColumns="2"
           RepeatDirection="Vertical"
           RepeatLayout="Table"
           TextAlign="Right"
           OnSelectedIndexChanged="Check_Clicked"
           runat="server">
 
         <asp:ListItem>Item 1</asp:ListItem>
         <asp:ListItem>Item 2</asp:ListItem>
         <asp:ListItem>Item 3</asp:ListItem>
         <asp:ListItem>Item 4</asp:ListItem>
         <asp:ListItem>Item 5</asp:ListItem>
         <asp:ListItem>Item 6</asp:ListItem>
 
      </asp:CheckBoxList>
 
      <br><br>

      <asp:label id="Message" runat="server"/>

      <hr>

      Select the number of columns to display.

      <table cellpadding="5">

         <tr>

            <td>

               RepeatColumns:

            </td>

         </tr>

         <tr>

            <td>

               <asp:DropDownList id="List"
                    AutoPostBack="True"
                    OnSelectedIndexChanged="Index_Change"
                    runat="server">

                  <asp:ListItem>0</asp:ListItem>
                  <asp:ListItem>1</asp:ListItem>
                  <asp:ListItem Selected="True">2</asp:ListItem>
                  <asp:ListItem>3</asp:ListItem>

               </asp:DropDownList>

            </td>

         </tr>

      </table>
             
   </form>
          
</body>

</html>


[C#] 

<%@ Page Language="C#" AutoEventWireup="True" %>

<html>

<head>

   <script runat="server">

      void Check_Clicked(Object sender, EventArgs e) 
      {

         Message.Text = "Selected Item(s):<br><br>";

         // Iterate through the Items collection of the CheckBoxList 
         // control and display the selected items.
         for (int i=0; i<checkboxlist1.Items.Count; i++)
         {

            if (checkboxlist1.Items[i].Selected)
            {

               Message.Text += checkboxlist1.Items[i].Text + "<br>";

            }

         }

      }

      void Index_Change(Object sender, EventArgs e) 
      {

         // Set the number columns in the CheckBoxList control.
         checkboxlist1.RepeatColumns = List.SelectedIndex;

      }

   </script>
 
</head>

<body>
   
   <form runat="server">
 
      <h3> CheckBoxList RepeatColumns Example </h3>

      Select items from the CheckBoxList.

      <br><br>

      <asp:CheckBoxList id="checkboxlist1" 
           AutoPostBack="True"
           CellPadding="5"
           CellSpacing="5"
           RepeatColumns="2"
           RepeatDirection="Vertical"
           RepeatLayout="Table"
           TextAlign="Right"
           OnSelectedIndexChanged="Check_Clicked"
           runat="server">
 
         <asp:ListItem>Item 1</asp:ListItem>
         <asp:ListItem>Item 2</asp:ListItem>
         <asp:ListItem>Item 3</asp:ListItem>
         <asp:ListItem>Item 4</asp:ListItem>
         <asp:ListItem>Item 5</asp:ListItem>
         <asp:ListItem>Item 6</asp:ListItem>
 
      </asp:CheckBoxList>
 
      <br><br>

      <asp:label id="Message" runat="server"/>

      <hr>

      Select the number of columns to display.

      <table cellpadding="5">

         <tr>

            <td>

               RepeatColumns:

            </td>

         </tr>

         <tr>

            <td>

               <asp:DropDownList id="List"
                    AutoPostBack="True"
                    OnSelectedIndexChanged="Index_Change"
                    runat="server">

                  <asp:ListItem>0</asp:ListItem>
                  <asp:ListItem>1</asp:ListItem>
                  <asp:ListItem Selected="True">2</asp:ListItem>
                  <asp:ListItem>3</asp:ListItem>

               </asp:DropDownList>

            </td>

         </tr>

      </table>
             
   </form>
          
</body>

</html>

[C++] No example is available for C++. To view a Visual Basic, C#, or JScript example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Platforms: Windows 2000, Windows XP Professional, Windows Server 2003 family

See Also

CheckBoxList Class | CheckBoxList Members | System.Web.UI.WebControls Namespace | RepeatDirection | RepeatLayout

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