ButtonType Enumeración
Definición
Importante
Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.
Especifica los diferentes tipos de botones que se pueden representar en una página de formularios Web Forms.
public enum class ButtonTypepublic enum ButtonTypetype ButtonType = Public Enum ButtonType- Herencia
Campos
| Button | 0 | Botón de comando. |
| Image | 1 | Un botón que muestra una imagen. |
| Link | 2 | Un botón con estilo de hipervínculo. |
Ejemplos
En el ejemplo siguiente se muestra cómo usar la ButtonType enumeración para especificar que los botones de vínculo se muestran en una ButtonField columna de campo de un GridView control . La ButtonType propiedad de un ButtonField objeto se establece declarativamente en 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>
Comentarios
La ButtonType enumeración se usa para representar los distintos tipos de botones (como el botón de comando, el botón de imagen, el botón de vínculo, etc.) que se pueden representar en una página de ASP.NET. Normalmente se usa en propiedades como la ButtonType propiedad de la ButtonFieldBase clase para indicar qué tipo de botón usa el control primario.