ButtonType Enumeração

Definição

Especifica os diferentes tipos de botões que podem ser renderizados em uma página do Web Forms.Specifies the different types of buttons that can be rendered in a Web Forms page.

public enum class ButtonType
public enum ButtonType
type ButtonType = 
Public Enum ButtonType
Herança
ButtonType

Campos

Button 0

Um botão de comando.A command button.

Image 1

Um botão que exibe uma imagem.A button that displays an image.

2

Um botão com estilo de hiperlink.A hyperlink-style button.

Exemplos

O exemplo a seguir demonstra como usar a ButtonType enumeração para especificar que os botões de link sejam exibidos em uma ButtonField coluna de campo de um GridView controle.The following example demonstrates how to use the ButtonType enumeration to specify that link buttons are displayed in a ButtonField field column of a GridView control. A ButtonType propriedade de um ButtonField objeto é declarativamente definida como ButtonType.Link .The ButtonType property of a ButtonField object is declaratively set to ButtonType.Link.


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

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  void AuthorsGridView_RowCommand(Object sender, GridViewCommandEventArgs e)
  {
  
    // If multiple ButtonField column fields are used, use the
    // CommandName property to determine which button was clicked.
    if(e.CommandName=="Select")
    {
    
      // Convert the row index stored in the CommandArgument
      // property to an Integer.
      int index = Convert.ToInt32(e.CommandArgument);    
    
      // Get the last name of the selected author from the appropriate
      // cell in the GridView control.
      GridViewRow selectedRow = AuthorsGridView.Rows[index];
      TableCell lastNameCell = selectedRow.Cells[1];
      string lastName = lastNameCell.Text;  
    
      // Display the selected author.
      Message.Text = "You selected " + lastName + ".";
      
    }
    
  }
  
  void AuthorsGridView_RowCreated(Object sender, GridViewRowEventArgs e)
  {
    
    // The GridViewCommandEventArgs class does not contain a 
    // property that indicates which row's command button was
    // clicked. To identify which row contains the button 
    // clicked, use the button's CommandArgument property by 
    // setting it to the row's index.
    if(e.Row.RowType == DataControlRowType.DataRow)
    {
    
      // Retrieve the button control from the first column.
      // Because the ButtonType property of the column field
      // is set to ButtonType.Link, the button control must be
      // cast to a LinkButton. If you specify a different button
      // type, you must cast the button control to the appropriate
      // button type.
      LinkButton selectButton = (LinkButton)e.Row.Cells[0].Controls[0];
            
      // Set the LinkButton's CommandArgument property with the
      // row's index.
      selectButton.CommandArgument = e.Row.RowIndex.ToString();
      
    }

  }
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>ButtonType Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>ButtonType Example</h3>
      
      <asp:label id="Message"
        forecolor="Red"
        runat="server"
        AssociatedControlID="AuthorsGridView"/>
                    
      <!-- Populate the Fields collection declaratively. -->
      <asp:gridview id="AuthorsGridView" 
        datasourceid="AuthorsSqlDataSource" 
        autogeneratecolumns="false"
        onrowcommand="AuthorsGridView_RowCommand" 
        runat="server">
                
        <columns>
                
          <asp:buttonfield buttontype="Link" commandname="Select" text="Select"/>
          <asp:boundfield datafield="au_lname" headertext="au_lname"/>
          <asp:boundfield datafield="au_fname" headertext="au_fname"/>
                
        </columns>
                
      </asp:gridview>
            
      <!-- This example uses Microsoft SQL Server and connects -->
      <!-- to the Pubs sample database.                        -->
      <asp:sqldatasource id="AuthorsSqlDataSource"  
        selectcommand="SELECT [au_lname], [au_fname] FROM [authors]"
        connectionstring="server=localhost;database=pubs;integrated security=SSPI"
        runat="server">
      </asp:sqldatasource>
            
    </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">
<script runat="server">

  Sub AuthorsGridView_RowCommand(ByVal sender As Object, ByVal e As GridViewCommandEventArgs)
  
    ' If multiple ButtonField column fields are used, use the
    ' CommandName property to determine which button was clicked.
    If e.CommandName = "Select" Then
    
      ' Convert the row index stored in the CommandArgument
      ' property to an Integer.
      Dim index As Integer = Convert.ToInt32(e.CommandArgument)    
    
      ' Get the last name of the selected author from the appropriate
      ' cell in the GridView control.
      Dim selectedRow As GridViewRow = AuthorsGridView.Rows(index)
      Dim lastNameCell As TableCell = selectedRow.Cells(1)
      Dim lastName As String = lastNameCell.Text  
    
      ' Display the selected author.
      Message.Text = "You selected " & lastName & "."
      
    End If
    
  End Sub
  
  Sub AuthorsGridView_RowCreated(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
    
    ' The GridViewCommandEventArgs class does not contain a 
    ' property that indicates which row's command button was
    ' clicked. To identify which row contains the button 
    ' clicked, use the button's CommandArgument property by 
    ' setting it to the row's index.
    If e.Row.RowType = DataControlRowType.DataRow Then
    
      ' Retrieve the button control from the first column.
      ' Because the ButtonType property of the column field
      ' is set to ButtonType.Link, the button control must be
      ' cast to a LinkButton. If you specify a different button
      ' type, you must cast the button control to the appropriate
      ' button type.
      Dim selectButton As LinkButton = CType(e.Row.Cells(0).Controls(0), LinkButton)
            
      ' Set the LinkButton's CommandArgument property with the
      ' row's index.
      selectButton.CommandArgument = e.Row.RowIndex.ToString()
      
    End If

  End Sub
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>ButtonType Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>ButtonType Example</h3>
      
      <asp:label id="Message"
        forecolor="Red"
        runat="server"
        AssociatedControlID="AuthorsGridView"/>
                    
      <!-- Populate the Columns collection declaratively. -->
      <asp:gridview id="AuthorsGridView" 
        datasourceid="AuthorsSqlDataSource" 
        autogeneratecolumns="false"
        onrowcommand="AuthorsGridView_RowCommand" 
        runat="server">
                
        <columns>
                
          <asp:buttonfield buttontype="Link" commandname="Select" text="Select"/>
          <asp:boundfield datafield="au_lname" headertext="au_lname"/>
          <asp:boundfield datafield="au_fname" headertext="au_fname"/>
                
        </columns>
                
      </asp:gridview>
            
      <!-- This example uses Microsoft SQL Server and connects -->
      <!-- to the Pubs sample database.                        -->
      <asp:sqldatasource id="AuthorsSqlDataSource"  
        selectcommand="SELECT [au_lname], [au_fname] FROM [authors]"
        connectionstring="server=localhost;database=pubs;integrated security=SSPI"
        runat="server">
      </asp:sqldatasource>
            
    </form>
  </body>
</html>

Comentários

A ButtonType enumeração é usada para representar os diferentes tipos de botões (como botão de comando, botão de imagem, botão de link e assim por diante) que podem ser renderizados em uma página ASP.net.The ButtonType enumeration is used to represent the different types of buttons (such as command button, image button, link button, and so on) that can be rendered on an ASP.NET page. Normalmente, ele é usado por propriedades como a ButtonType propriedade da ButtonFieldBase classe para indicar qual tipo de botão está sendo usado pelo controle pai.It is commonly used by properties such as the ButtonType property of the ButtonFieldBase class to indicate which button type is being used by the parent control.

Aplica-se a

Confira também