BoundField.ApplyFormatInEditMode 屬性

定義

取得或設定值,表示當包含 DataFormatString 物件的資料繫結控制項處於編輯模式時,是否將 BoundField 屬性指定的格式字串套用至欄位值。

public:
 virtual property bool ApplyFormatInEditMode { bool get(); void set(bool value); };
public virtual bool ApplyFormatInEditMode { get; set; }
member this.ApplyFormatInEditMode : bool with get, set
Public Overridable Property ApplyFormatInEditMode As Boolean

屬性值

true 表示在編輯模式下將格式字串套用至欄位值,否則為 false。 預設為 false

範例

下列程式碼範例示範如何在控制項處於編輯模式時 GridView ,使用 ApplyFormatInEditMode 屬性將格式字串套用至域值。 然後,會在資料來源中更新值之前,以程式設計方式移除格式設定。


<%@ 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 CustomersGridView_RowUpdating(Object sender, GridViewUpdateEventArgs e)
  {
    
    // Use the NewValues property to retrieve the updated CustomerID
    // value entered by the user.
    String customerID = e.NewValues["CustomerID"].ToString();
  
    // Remove the formating applied by the DataFormatString property.
    if(customerID.StartsWith("D:"))
    {
      e.NewValues["CustomerID"] = customerID.Substring(2);
    }

  }
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>BoundField Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>BoundField Example</h3>

      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="false"
        autogenerateeditbutton="true"
        allowpaging="true" 
        datakeynames="CustomerID"
        onrowupdating="CustomersGridView_RowUpdating"   
        runat="server">
         
        <columns>
          <asp:boundfield datafield="CustomerID"
            dataformatstring="D:{0}"
            applyformatineditmode="true"       
            headertext="Customer ID"/>
          <asp:boundfield datafield="CompanyName"
            convertemptystringtonull="true"
            headertext="Customer Name"/>
          <asp:boundfield datafield="Address"
            convertemptystringtonull="true"
            headertext="Address"/>
          <asp:boundfield datafield="City"
            convertemptystringtonull="true"
            headertext="City"/>
          <asp:boundfield datafield="PostalCode"
            convertemptystringtonull="true"
            headertext="ZIP Code"/>
          <asp:boundfield datafield="Country"
            convertemptystringtonull="true"
            headertext="Country"/>
        </columns>
                
      </asp:gridview>
            
      <!-- This example uses Microsoft SQL Server and connects  -->
      <!-- to the Northwind sample database. Use an ASP.NET     -->
      <!-- expression to retrieve the connection string value   -->
      <!-- from the Web.config file.                            -->
      <asp:sqldatasource id="CustomersSqlDataSource"  
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        updatecommand="Update Customers Set CustomerID=@CustomerID, CompanyName=@CompanyName, Address=@Address, City=@City, PostalCode=@PostalCode, Country=@Country Where (CustomerID = @CustomerID)"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </asp:sqldatasource>
            
    </form>
  </body>
</html>

<%@ Page language="VB" AutoEventWireup="false" %>

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

  Sub CustomersGridView_RowUpdating(ByVal sender As Object, ByVal e As GridViewUpdateEventArgs) Handles CustomersGridView.RowUpdating
    
    ' Use the NewValues property to retrieve the updated CustomerID
    ' value entered by the user.
    Dim customerID As String = e.NewValues("CustomerID").ToString()
  
    ' Remove the formating applied by the DataFormatString property.
    If customerID.StartsWith("D:") Then
    
      e.NewValues("CustomerID") = customerID.Substring(2)
      
    End If

  End Sub
    
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>BoundField Example</title>
</head>
<body>
    <form id="form1" runat="server">
        
      <h3>BoundField Example</h3>

      <asp:gridview id="CustomersGridView" 
        datasourceid="CustomersSqlDataSource" 
        autogeneratecolumns="false"
        autogenerateeditbutton="true"
        allowpaging="true" 
        datakeynames="CustomerID"  
        runat="server">
         
        <columns>
          <asp:boundfield datafield="CustomerID"
            dataformatstring="D:{0}"
            applyformatineditmode="true"       
            headertext="Customer ID"/>
          <asp:boundfield datafield="CompanyName"
            convertemptystringtonull="true"
            headertext="Customer Name"/>
          <asp:boundfield datafield="Address"
            convertemptystringtonull="true"
            headertext="Address"/>
          <asp:boundfield datafield="City"
            convertemptystringtonull="true"
            headertext="City"/>
          <asp:boundfield datafield="PostalCode"
            convertemptystringtonull="true"
            headertext="ZIP Code"/>
          <asp:boundfield datafield="Country"
            convertemptystringtonull="true"
            headertext="Country"/>
        </columns>
                
      </asp:gridview>
            
      <!-- This example uses Microsoft SQL Server and connects  -->
      <!-- to the Northwind sample database. Use an ASP.NET     -->
      <!-- expression to retrieve the connection string value   -->
      <!-- from the Web.config file.                            -->
      <asp:sqldatasource id="CustomersSqlDataSource"  
        selectcommand="Select [CustomerID], [CompanyName], [Address], [City], [PostalCode], [Country] From [Customers]"
        updatecommand="Update Customers Set CustomerID=@CustomerID, CompanyName=@CompanyName, Address=@Address, City=@City, PostalCode=@PostalCode, Country=@Country Where (CustomerID = @CustomerID)"
        connectionstring="<%$ ConnectionStrings:NorthWindConnectionString%>"
        runat="server">
      </asp:sqldatasource>
            
    </form>
  </body>
</html>

備註

資料繫結控制項 (例如 DetailsViewFormViewGridView) 有不同的顯示模式,可讓使用者讀取、編輯或插入記錄。 根據預設,只有當資料繫結控制項處於唯讀模式時,屬性所 DataFormatString 指定的格式字串才會套用至域值。 若要將格式化字串套用至資料繫結控制項處於編輯模式時所顯示的值,請將 ApplyFormatInEditMode 屬性設定為 true

注意

BoundField物件不會在資料來源中更新欄位時自動移除格式設定。 如果您不想將格式設定作為儲存值的一部分,您必須以程式設計方式移除格式設定。

適用於

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