ButtonFieldBase.ValidationGroup Свойство

Ссылка

Определение

Пространство имен:: System.Web.UI.WebControls

Сборка:: System.Web.dll

Важно!

Некоторые сведения относятся к предварительной версии продукта, в которую до выпуска могут быть внесены существенные изменения. Майкрософт не предоставляет никаких гарантий, явных или подразумеваемых, относительно приведенных здесь сведений.

Получает или задает имя группы проверочных элементов управления для проверки при нажатии кнопки в объекте ButtonFieldBase.

public:
 virtual property System::String ^ ValidationGroup { System::String ^ get(); void set(System::String ^ value); };

public virtual string ValidationGroup { get; set; }

member this.ValidationGroup : string with get, set

Public Overridable Property ValidationGroup As String

Значение свойства

String

Имя группы для проверки при нажатии кнопки ButtonFieldBase. По умолчанию используется пустая строка (""), указывающая, что свойство ValidationGroup не задано.

Примеры

В следующем примере кода показано, как использовать ValidationGroup свойство , чтобы указать, что при нажатии кнопки в ButtonField объекте GridView элемента управления проверяется только определенная группа элементов управления.

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

<script runat="server">

  void AuthorsGridView_RowCommand(Object sender, GridViewCommandEventArgs e)
  {
  
    // If multiple ButtonField columns are used, use the
    // CommandName property to determine which button was clicked.
    switch(e.CommandName)
    {
    
      case "Edit":
        AuthorsGridView.Columns[0].Visible = false;
        AuthorsGridView.Columns[1].Visible = true;
        break;
      case "Update":
        AuthorsGridView.Columns[0].Visible = true;
        AuthorsGridView.Columns[1].Visible = false;
        break;
      default:
        // Do nothing.
        break;
    }
    
  }
  
  void AuthorsGridView_RowUpdating (Object sender, GridViewUpdateEventArgs e)
  {
    
    // Retrieve the row being edited.    
    int index = AuthorsGridView.EditIndex;
    GridViewRow row = AuthorsGridView.Rows[index];
    
    // Retrieve the new value for the author's first name from the row. 
    // In this example, the author's first name is in the second cell 
    // of the row (index 1). To get the value, first retrieve the TextBox
    // that contains the value.
    TextBox firstNameTextBox = (TextBox)row.Cells[1].FindControl("FirstNameTextBox");
    
    // Make sure the control was found. 
    String firstName = "";    
    if(firstNameTextBox != null)
    {
      firstName = firstNameTextBox.Text;
    }
    
    // Retrieve the new value for the author's last name from the row. 
    // In this example, the author's last name is in the third cell 
    // of the row (index 2).
    TextBox lastNameTextBox = (TextBox)row.Cells[2].FindControl("LastNameTextBox");
    
    String lastName = "";
    if(lastNameTextBox != null)
    {
      lastName = lastNameTextBox.Text;
    }
    
    // Because custom TemplateField field columns are used, parameters 
    // are not automatically created and passed to the data source control.
    // Create Parameter objects to represent the fields to update and 
    // add the Parameter objects to the UpdateParameters collection.
    Parameter lastNameParameter = new Parameter("au_lname", TypeCode.String, lastName);   
    Parameter firstNameParameter = new Parameter("au_fname", TypeCode.String, firstName);
    
    // Clear the UpdateParameters collection before adding the 
    // Parameter objects. Otherwise, there will be duplicate
    // parameters.
    AuthorsSqlDataSource.UpdateParameters.Clear();
    AuthorsSqlDataSource.UpdateParameters.Add(lastNameParameter);
    AuthorsSqlDataSource.UpdateParameters.Add(firstNameParameter);
    
  }
    
</script>

<head runat="server">
    <title>ButtonFieldBase CausesValidation Example</title>
</head>
<body>
  <form id="form1" runat="server">
  <div>

    <h3>ButtonFieldBase CausesValidation Example</h3>

    <!-- Populate the Columns collection declaratively. -->
    <asp:gridview id="AuthorsGridView" 
      datasourceid="AuthorsSqlDataSource"
      cellpadding="5"  
      autogeneratecolumns="false"
      datakeynames="au_id" 
      onrowcommand="AuthorsGridView_RowCommand"
      onrowupdating="AuthorsGridView_RowUpdating"  
      runat="server">

      <columns>
        <asp:buttonfield commandname="Edit"
          causesvalidation="false" 
          text="Edit" 
          headertext="Edit Author">
        </asp:buttonfield>

        <asp:buttonfield commandname="Update" 
          visible="false" 
          causesvalidation="true" 
          text="Update"
          validationgroup="NameGroup" 
          headertext="Update Author">
        </asp:buttonfield>

        <asp:templatefield headertext="Last Name">
          <itemtemplate>
            <%# Eval("au_lname") %>
          </itemtemplate>

          <edititemtemplate>
            <asp:textbox id="LastNameTextBox"
              text='<%# Eval("au_lname") %>'
              width="175" 
              runat="server" /><br />  

            <asp:RequiredFieldValidator ID="LastNameRequiredValidator"
              ControlToValidate="LastNameTextBox"
              ErrorMessage="Please enter a last name."
              ValidationGroup="NameGroup" 
              Runat="server" />

          </edititemtemplate>
        </asp:templatefield>

        <asp:templatefield headertext="First Name">
          <itemtemplate>
            <%# Eval("au_fname") %>
          </itemtemplate>

          <edititemtemplate>
            <asp:textbox id="FirstNameTextBox"
              text='<%# Eval("au_fname") %>'
              width="175" 
              runat="server" /><br />  

            <asp:RequiredFieldValidator ID="FirstNameRequiredValidator"
              ControlToValidate="FirstNameTextBox"
              ErrorMessage="Please enter a first name."
              ValidationGroup="NameGroup" 
              Runat="server" />

          </edititemtemplate>

        </asp:templatefield>
      </columns>

    </asp:gridview>

    <!-- This example uses Microsoft SQL Server and connects -->
    <!-- to the Pubs sample database.                        -->
    <asp:sqldatasource id="AuthorsSqlDataSource"  
      selectcommand="SELECT [au_id], [au_lname], [au_fname] FROM [authors]"
      updatecommand="UPDATE authors SET au_lname=@au_lname, au_fname=@au_fname WHERE (authors.au_id = @au_id)"
      connectionstring="server=localhost;database=pubs;integrated security=SSPI"
      runat="server">   
    </asp:sqldatasource>

  </div>
  </form>
</body>
</html>


<%@ Page language="VB" %>

<script runat="server">

  Sub AuthorsGridView_RowCommand(ByVal sender As Object, ByVal e As GridViewCommandEventArgs)
  
    ' If multiple ButtonField columns are used, use the
    ' CommandName property to determine which button was clicked.
    Select Case e.CommandName
    
      Case "Edit"
        AuthorsGridView.Columns(0).Visible = False
        AuthorsGridView.Columns(1).Visible = True
      Case "Update"
        AuthorsGridView.Columns(0).Visible = True
        AuthorsGridView.Columns(1).Visible = False
      Case Else
        ' Do nothing.
   
    End Select
    
  End Sub
  
  Sub AuthorsGridView_RowUpdating(ByVal sender As Object, ByVal e As GridViewUpdateEventArgs)
    
    ' Retrieve the row being edited.    
    Dim index As Integer = AuthorsGridView.EditIndex
    Dim row As GridViewRow = AuthorsGridView.Rows(index)
    
    ' Retrieve the new value for the author's first name from the row. 
    ' In this example, the author's first name is in the second cell 
    ' of the row (index 1). To get the value, first retrieve the TextBox
    ' that contains the value.
    Dim firstNameTextBox As TextBox = CType(row.Cells(1).FindControl("FirstNameTextBox"), TextBox)
    
    ' Make sure the control was found. 
    Dim firstName As String = ""
    If Not firstNameTextBox Is Nothing Then

      firstName = firstNameTextBox.Text
      
    End If
    
    ' Retrieve the new value for the author's last name from the row. 
    ' In this example, the author's last name is in the third cell 
    ' of the row (index 2).
    Dim lastNameTextBox As TextBox = CType(row.Cells(2).FindControl("LastNameTextBox"), TextBox)
    
    Dim lastName As String = ""
    If Not lastNameTextBox Is Nothing Then
    
      lastName = lastNameTextBox.Text
      
    End If
    
    ' Because custom TemplateField field columns are used, parameters 
    ' are not automatically created and passed to the data source control.
    ' Create Parameter objects to represent the fields to update and 
    ' add the Parameter objects to the UpdateParameters collection.
    Dim lastNameParameter As New Parameter("au_lname", TypeCode.String, lastName)
    Dim firstNameParameter As New Parameter("au_fname", TypeCode.String, firstName)
    
    ' Clear the UpdateParameters collection before adding the 
    ' Parameter objects. Otherwise, there will be duplicate
    ' parameters.
    AuthorsSqlDataSource.UpdateParameters.Clear()
    AuthorsSqlDataSource.UpdateParameters.Add(lastNameParameter)
    AuthorsSqlDataSource.UpdateParameters.Add(firstNameParameter)
    
  End Sub
    
</script>

<head runat="server">
    <title>ButtonFieldBase CausesValidation Example</title>
</head>
<body>
  <form id="form1" runat="server">
  <div>

    <h3>ButtonFieldBase CausesValidation Example</h3>

    <!-- Populate the Columns collection declaratively. -->
    <asp:gridview id="AuthorsGridView" 
      datasourceid="AuthorsSqlDataSource"
      cellpadding="5"  
      autogeneratecolumns="false"
      datakeynames="au_id" 
      onrowcommand="AuthorsGridView_RowCommand"
      onrowupdating="AuthorsGridView_RowUpdating"  
      runat="server">

      <columns>
        <asp:buttonfield commandname="Edit"
          causesvalidation="false" 
          text="Edit" 
          headertext="Edit Author">
        </asp:buttonfield>

        <asp:buttonfield commandname="Update" 
          visible="false" 
          causesvalidation="true" 
          text="Update"
          validationgroup="NameGroup" 
          headertext="Update Author">
        </asp:buttonfield>

        <asp:templatefield headertext="Last Name">
          <itemtemplate>
            <%# Eval("au_lname") %>
          </itemtemplate>

          <edititemtemplate>
            <asp:textbox id="LastNameTextBox"
              text='<%# Eval("au_lname") %>'
              width="175" 
              runat="server" /><br />  

            <asp:RequiredFieldValidator ID="LastNameRequiredValidator"
              ControlToValidate="LastNameTextBox"
              ErrorMessage="Please enter a last name."
              ValidationGroup="NameGroup" 
              Runat="server" />

          </edititemtemplate>
        </asp:templatefield>

        <asp:templatefield headertext="First Name">
          <itemtemplate>
            <%# Eval("au_fname") %>
          </itemtemplate>

          <edititemtemplate>
            <asp:textbox id="FirstNameTextBox"
              text='<%# Eval("au_fname") %>'
              width="175" 
              runat="server" /><br />  

            <asp:RequiredFieldValidator ID="FirstNameRequiredValidator"
              ControlToValidate="FirstNameTextBox"
              ErrorMessage="Please enter a first name."
              ValidationGroup="NameGroup" 
              Runat="server" />

          </edititemtemplate>

        </asp:templatefield>
      </columns>

    </asp:gridview>

    <!-- This example uses Microsoft SQL Server and connects -->
    <!-- to the Pubs sample database.                        -->
    <asp:sqldatasource id="AuthorsSqlDataSource"  
      selectcommand="SELECT [au_id], [au_lname], [au_fname] FROM [authors]"
      updatecommand="UPDATE authors SET au_lname=@au_lname, au_fname=@au_fname WHERE (authors.au_id = @au_id)"
      connectionstring="server=localhost;database=pubs;integrated security=SSPI"
      runat="server">   
    </asp:sqldatasource>

  </div>
  </form>
</body>
</html>

Используйте свойство , ValidationGroup чтобы указать группу проверки, проверяемую при нажатии кнопки в ButtonFieldBase объекте. Проверяются только элементы управления в указанной группе проверки.

Примечание

Свойство CausesValidation должно иметь значение , true чтобы ValidationGroup свойство могло иметь эффект.

Дополнительные сведения о группах проверки см. в разделе BaseValidator.ValidationGroup.

Значение этого свойства хранится в состоянии представления.

Применяется к

Поделиться через

ButtonFieldBase.ValidationGroup Свойство

Определение

Значение свойства

Примеры

Комментарии

Применяется к

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