BulletedList.FirstBulletNumber Property

Reference

Definition

Namespace:: System.Web.UI.WebControls

Assembly:: System.Web.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets or sets the value that starts the numbering of list items in an ordered BulletedList control.

public:
 virtual property int FirstBulletNumber { int get(); void set(int value); };

public virtual int FirstBulletNumber { get; set; }

member this.FirstBulletNumber : int with get, set

Public Overridable Property FirstBulletNumber As Integer

Property Value

Int32

The value that starts the numbering of list items in an ordered BulletedList control. The default is 1.

Examples

The following code example demonstrates how to create a BulletedList control and set the FirstBulletNumber property to specify the value that starts the numbering of list items in the BulletedList control. The value that starts the numbering of the list items changes based on the value that the user enters in the text box.

Important

This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.

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

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
  <title>First Bullet Number Example</title>
  <script runat="server">

    void Index_Changed(object sender, System.EventArgs e)
    {
        
      // Set the starting number for the bulleted list.
        ItemsBulletedList.FirstBulletNumber = Convert.ToInt32(StartValue.Text);
        switch (BulletStylesListBox.SelectedIndex) 
      {
            case 0:
                ItemsBulletedList.BulletStyle = BulletStyle.Numbered;
                break;
            case 1:
                ItemsBulletedList.BulletStyle = BulletStyle.LowerAlpha;
                break;
            case 2:
                ItemsBulletedList.BulletStyle = BulletStyle.UpperAlpha;
                break;
            case 3:
                ItemsBulletedList.BulletStyle = BulletStyle.LowerRoman;
                break;
            case 4:
                ItemsBulletedList.BulletStyle = BulletStyle.UpperRoman;
                break;
            default:
                throw new Exception("You did not select a valid bullet style");
                break;
        }
    }

  </script>

</head>
<body>

  <h3>First Bullet Number Example</h3>

  <form id="form1" runat="server">
                    
    <asp:BulletedList id="ItemsBulletedList"             
      BulletStyle="Disc" 
      DisplayMode="Text"
      runat="server">    
        <asp:ListItem Value="http://www.cohowinery.com">Coho Winery</asp:ListItem>
        <asp:ListItem Value="http://www.contoso.com">Contoso, Ltd.</asp:ListItem>
        <asp:ListItem Value="http://www.tailspintoys.com">Tailspin Toys</asp:ListItem>
    </asp:BulletedList>    
              
    <hr />
        
    <h4>Enter the first number to start the list</h4>        
        
    <asp:TextBox id="StartValue" 
      Text="1"
      runat="server">
    </asp:TextBox><br />    
            
    <asp:RangeValidator id="Range1" 
      ControlToValidate="StartValue"
      MinimumValue="1"
      MaximumValue="32000"
      Type="Integer"
      ErrorMessage="Please enter a number greater than zero and less than 32,000."
      runat="server">
    </asp:RangeValidator><br />            
        
    <h4>Select a bullet type:</h4>
    <asp:ListBox id="BulletStylesListBox" 
      SelectionMode="Single"
      Rows="1"
      AutoPostBack="True"
      OnSelectedIndexChanged="Index_Changed"
      CausesValidation="true"
      runat="server" >        
        <asp:ListItem Value="Numbered">Numbered</asp:ListItem>
        <asp:ListItem Value="LowerAlpha">LowerAlpha</asp:ListItem>
        <asp:ListItem Value="UpperAlpha">UpperAlpha</asp:ListItem>
        <asp:ListItem Value="LowerRoman">LowerRoman</asp:ListItem>
        <asp:ListItem Value="UpperRoman">UpperRoman</asp:ListItem>       
    </asp:ListBox><br />

    <hr />
  </form>

</body>
</html>

<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
  <title>First Bullet Number Example</title>
  <script runat="server">

    Sub Index_Changed(ByVal sender As Object, ByVal e As System.EventArgs)
      
      ' Set the starting number for the bulleted list.
      ItemsBulletedList.FirstBulletNumber = StartValue.Text
      Select Case (BulletStylesListBox.SelectedIndex)
        Case 0
          ItemsBulletedList.BulletStyle = BulletStyle.Numbered
        Case 1
          ItemsBulletedList.BulletStyle = BulletStyle.LowerAlpha
        Case 2
          ItemsBulletedList.BulletStyle = BulletStyle.UpperAlpha
        Case 3
          ItemsBulletedList.BulletStyle = BulletStyle.LowerRoman
        Case 4
          ItemsBulletedList.BulletStyle = BulletStyle.UpperRoman
        Case Else
          Throw New Exception("You did not select a valid bullet style")
      End Select
    End Sub

  </script>

</head>
<body>

  <h3>First Bullet Number Example</h3>

  <form id="form1" runat="server">
                    
    <asp:BulletedList id="ItemsBulletedList"             
      BulletStyle="Disc" 
      DisplayMode="Text"
      runat="server">    
        <asp:ListItem Value="http://www.cohowinery.com">Coho Winery</asp:ListItem>
        <asp:ListItem Value="http://www.contoso.com">Contoso, Ltd.</asp:ListItem>
        <asp:ListItem Value="http://www.tailspintoys.com">Tailspin Toys</asp:ListItem>
    </asp:BulletedList>    
              
    <hr />
        
    <h4>Enter the first number to start the list</h4>        
        
    <asp:TextBox id="StartValue" 
      Text="1"
      runat="server">
    </asp:TextBox><br />    
            
    <asp:RangeValidator id="Range1" 
      ControlToValidate="StartValue"
      MinimumValue="1"
      MaximumValue="32000"
      Type="Integer"
      ErrorMessage="Please enter a number greater than zero and less than 32,000."
      runat="server" >
    </asp:RangeValidator><br />            
        
    <h4>Select a bullet type:</h4>
    <asp:ListBox id="BulletStylesListBox" 
      SelectionMode="Single"
      Rows="1"
      AutoPostBack="True"
      OnSelectedIndexChanged="Index_Changed"
      CausesValidation="true"
      runat="server" >        
        <asp:ListItem Value="Numbered">Numbered</asp:ListItem>
        <asp:ListItem Value="LowerAlpha">LowerAlpha</asp:ListItem>
        <asp:ListItem Value="UpperAlpha">UpperAlpha</asp:ListItem>
        <asp:ListItem Value="LowerRoman">LowerRoman</asp:ListItem>
        <asp:ListItem Value="UpperRoman">UpperRoman</asp:ListItem>
    </asp:ListBox><br />

    <hr />
  </form>

</body>
</html>

Remarks

Use the FirstBulletNumber property to specify the value that starts the numbering of list items in an ordered BulletedList control. The value that is assigned to the FirstBulletNumber property is ignored, if the BulletStyle property is set to the Disc, Square, Circle, or CustomImage values. Although the value of the FirstBulletNumber property is an integer, it does not always cause a bullet to render as a number. For example, if you set the FirstBulletNumber property to 4 and set the BulletStyle property to the value LowerAlpha, the first bullet number will render as a lowercase d.

The value of this property is stored in view state.

Applies to

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