CheckBoxList.TextAlign Vlastnost

  • Reference

Definice

Obor názvů:
System.Web.UI.WebControls
Sestavení:
System.Web.dll

Získá nebo nastaví zarovnání textu pro zaškrtávací políčka v rámci skupiny.

public:
 virtual property System::Web::UI::WebControls::TextAlign TextAlign { System::Web::UI::WebControls::TextAlign get(); void set(System::Web::UI::WebControls::TextAlign value); };
[System.ComponentModel.Bindable(true)]
public virtual System.Web.UI.WebControls.TextAlign TextAlign { get; set; }
public virtual System.Web.UI.WebControls.TextAlign TextAlign { get; set; }
[<System.ComponentModel.Bindable(true)>]
member this.TextAlign : System.Web.UI.WebControls.TextAlign with get, set
member this.TextAlign : System.Web.UI.WebControls.TextAlign with get, set
Public Overridable Property TextAlign As TextAlign

Hodnota vlastnosti

TextAlign

Jedna z TextAlign hodnot. Výchozí hodnota je Right.

Atributy
BindableAttribute

Výjimky

ArgumentOutOfRangeException

Zadané zarovnání textu popisku není jednou z TextAlign hodnot.

Příklady

Následující příklad kódu ukazuje, jak pomocí TextAlign vlastnosti určit, že text přidružený k zaškrtávacím polím se zobrazí na pravé straně CheckBoxList ovládacího prvku.

Poznámka

Následující ukázky kódu používají model kódu s jedním souborem a nemusí správně fungovat, pokud jsou zkopírovány přímo do souboru kódu na pozadí. Každý vzorový kód musí být zkopírován do prázdného textového souboru s příponou .aspx. Další informace o modelu kódu Web Forms najdete v tématu ASP.NET Web Forms model kódu stránky.

<%@ Page Language="C#" AutoEventWireup="True" %>
<!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>
    <title>CheckBoxList Example</title>
<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 id="form1" 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>

<%@ Page Language="VB" AutoEventWireup="True" %>
<!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>
    <title>CheckBoxList Example</title>
<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 id="form1" 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>


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

<!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> CheckBoxList TextAlign Example </title>
<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 alignment of the caption (right or left) in relation
         // to the check boxes.
         // Note that the TextAlign enumeration starts at 1 instead of 0, 
         // so the value of the SelectedIndex property cannot be used
         // directly for casting into a TextAlign enumeration.

         // In this example, the values of the TextAlign enumeration are 
         // stored in the Value property of each ListItem in the 
         // DropDownList control named List. To determine the enumeration  
         // value, retrieve the value of the Value property, convert it to
         // an Int32, and then cast it to a TextAlign enumeration.
         int EnumValue = Convert.ToInt32(List.SelectedItem.Value);

         checkboxlist1.TextAlign = (TextAlign)EnumValue;

      }

   </script>
 
</head>

<body>
   
   <form id="form1" runat="server">
 
      <h3> CheckBoxList TextAlign 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 whether to display the captions to the right or the left 
      of the check boxes.

      <table cellpadding="5">

         <tr>

            <td>

               TextAlign:

            </td>

         </tr>

         <tr>

            <td>

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

                  <asp:ListItem Value="1">Left</asp:ListItem>
                  <asp:ListItem Value="2" Selected="True">Right</asp:ListItem>

               </asp:DropDownList>

            </td>

         </tr>

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

</html>


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

<!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> CheckBoxList TextAlign Example </title>
<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 alignment of the caption (right or left) in relation
         ' to the check boxes.
         ' Note that the TextAlign enumeration starts at 1 instead of 0, 
         ' so the value of the SelectedIndex property cannot be used
         ' directly for casting into a TextAlign enumeration.

         ' In this example, the values of the TextAlign enumeration are 
         ' stored in the Value property of each ListItem in the 
         ' DropDownList control named List. To determine the enumeration  
         ' value, retrieve the value of the Value property, convert it to
         ' an Int32, and then cast it to a TextAlign enumeration.
         Dim EnumValue As Integer = Convert.ToInt32(List.SelectedItem.Value)

         checkboxlist1.TextAlign = CType(EnumValue, TextAlign)

      End Sub

   </script>
 
</head>

<body>
   
   <form id="form1" runat="server">
 
      <h3> CheckBoxList TextAlign 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 whether to display the captions to the right or the left 
      of the check boxes.

      <table cellpadding="5">

         <tr>

            <td>

               TextAlign:

            </td>

         </tr>

         <tr>

            <td>

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

                  <asp:ListItem Value="1">Left</asp:ListItem>
                  <asp:ListItem Value="2" Selected="True">Right</asp:ListItem>

               </asp:DropDownList>

            </td>

         </tr>

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

</html>

Poznámky

Tato vlastnost slouží k určení, jestli se text přidružený k zaškrtávacím polím zobrazí nalevo nebo vpravo od zaškrtávacího políčka. Pokud je tato vlastnost nastavená na TextAlign.Right, zobrazí se text napravo od zaškrtávacího políčka. Pokud je tato vlastnost nastavená na TextAlign.Left, text se zobrazí nalevo od zaškrtávacího políčka.

Platí pro

Viz také