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SqlDataSource.UpdateCommand 屬性

定義

取得或設定 SQL 字串,SqlDataSource 控制項會用來更新基礎資料庫的資料。

public:
 property System::String ^ UpdateCommand { System::String ^ get(); void set(System::String ^ value); };
public string UpdateCommand { get; set; }
member this.UpdateCommand : string with get, set
Public Property UpdateCommand As String

屬性值

SQL 字串,SqlDataSource 會用來更新資料。

範例

本節包含兩個程式碼範例。 第一個程式代碼範例示範如何使用 控件來設定 UpdateCommand 控件的 SqlDataSource 屬性,並使用控件更新 Microsoft SQL Server 資料庫中 GridView 的數據。 第二個程式代碼範例示範如何使用 控件更新 ODBC 資料庫中 GridView 的數據。

下列程式代碼範例示範如何使用 控件來設定 UpdateCommand 控件的 SqlDataSource 屬性,並使用控件更新 SQL Server 資料庫中 GridView 的數據。 會自動GridViewUpdateParameters入集合、從 BoundField 物件推斷參數,並在選取 [可GridView編輯專案上的更新] 連結時呼叫 Update 方法。 此範例也包含一些後續處理:更新記錄之後,就會傳送通知電子郵件訊息。

<%@Page  Language="C#" %>
<%@Import Namespace="System.Web.Mail" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
 private void OnDSUpdatedHandler(Object source, SqlDataSourceStatusEventArgs e) {
    if (e.AffectedRows > 0) {
        // Perform any additional processing, 
        // such as setting a status label after the operation.
        Label1.Text = Request.LogonUserIdentity.Name +
            " changed user information successfully!";    
    }
    else {
        Label1.Text = "No data updated!";
    }
 }
</script>

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

      <asp:SqlDataSource
          id="SqlDataSource1"
          runat="server"
          DataSourceMode="DataSet"
          ConnectionString="<%$ ConnectionStrings:MyNorthwind%>"
          SelectCommand="SELECT EmployeeID,FirstName,LastName,Title FROM Employees"
          UpdateCommand="Update Employees SET FirstName=@FirstName,LastName=@LastName,Title=@Title WHERE EmployeeID=@EmployeeID"
          OnUpdated="OnDSUpdatedHandler">
      </asp:SqlDataSource>

      <asp:GridView
          id="GridView1"
          runat="server"
          AutoGenerateColumns="False"
          DataKeyNames="EmployeeID"
          AutoGenerateEditButton="True"
          DataSourceID="SqlDataSource1">
          <columns>
              <asp:BoundField HeaderText="First Name" DataField="FirstName" />
              <asp:BoundField HeaderText="Last Name" DataField="LastName" />
              <asp:BoundField HeaderText="Title" DataField="Title" />
          </columns>
      </asp:GridView>

      <asp:Label
          id="Label1"
          runat="server">
      </asp:Label>

    </form>
  </body>
</html>
<%@Page  Language="VB" %>
<%@Import Namespace="System.Web.Mail" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

 Sub OnDSUpdatedHandler(ByVal source As Object, ByVal e As SqlDataSourceStatusEventArgs)
    If e.AffectedRows > 0 Then
        ' Perform any additional processing, 
        ' such as setting a status label after the operation.        
        Label1.Text = Request.LogonUserIdentity.Name & _
            " changed user information successfully!"
    Else 
        Label1.Text = "No data updated!"
    End If
 End Sub 'OnDSUpdatedHandler
</script>

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

      <asp:SqlDataSource
          id="SqlDataSource1"
          runat="server"
          DataSourceMode="DataSet"
          ConnectionString="<%$ ConnectionStrings:MyNorthwind%>"
          SelectCommand="SELECT EmployeeID,FirstName,LastName,Title FROM Employees"
          UpdateCommand="Update Employees SET FirstName=@FirstName,LastName=@LastName,Title=@Title WHERE EmployeeID=@EmployeeID"
          OnUpdated="OnDSUpdatedHandler">
      </asp:SqlDataSource>

      <asp:GridView
          id="GridView1"
          runat="server"
          AutoGenerateColumns="False"
          DataKeyNames="EmployeeID"
          AutoGenerateEditButton="True"
          DataSourceID="SqlDataSource1">
          <columns>
              <asp:BoundField HeaderText="First Name" DataField="FirstName" />
              <asp:BoundField HeaderText="Last Name" DataField="LastName" />
              <asp:BoundField HeaderText="Title" DataField="Title" />
          </columns>
      </asp:GridView>

      <asp:Label
          id="Label1"
          runat="server">
      </asp:Label>

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

下列程式代碼範例的功能與上述程式代碼範例相同,示範如何使用 控件來更新 ODBC 資料庫中 GridView 的數據。 ProviderName會設定為 ODBC 的 ADO.NET 提供者,System.Data.OdbcConnectionString 屬性會設定為 ODBC 數據來源名稱的名稱, (DSN) 。

<%@Page  Language="C#" %>
<%@Import Namespace="System.Web.Mail" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

 private void OnDSUpdatedHandler(Object source, SqlDataSourceStatusEventArgs e) {
    if (e.AffectedRows > 0) {
        // Perform any additional processing, such as sending an email notification.
        Label1.Text = Request.LogonUserIdentity.Name +
            " changed user information successfully!";
    }
    else {
        Label1.Text = "No data updated!";
    }
 }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <!-- This example uses a Northwind database that is hosted by an ODBC-compliant
         database. To run this sample, create an ODBC DSN to any database that hosts
         the Northwind database, including Microsoft SQL Server or Microsoft Access,
         change the name of the DSN in the ConnectionString, and view the page.
    -->
    <form id="form1" runat="server">

      <asp:SqlDataSource
          id="SqlDataSource1"
          runat="server"
          ProviderName="System.Data.Odbc"
          DataSourceMode="DataSet"
          ConnectionString="dsn=myodbc3dsn;"
          SelectCommand="SELECT EmployeeID,FirstName,LastName,Title FROM Employees"
          UpdateCommand="Update Employees SET FirstName=?,LastName=?,Title=? WHERE EmployeeID=?"
          OnUpdated="OnDSUpdatedHandler">
      </asp:SqlDataSource>

      <asp:GridView
          id="GridView1"
          runat="server"
          AutoGenerateColumns="False"
          DataKeyNames="EmployeeID"
          AutoGenerateEditButton="True"
          DataSourceID="SqlDataSource1">
          <columns>
              <asp:BoundField HeaderText="First Name" DataField="FirstName" />
              <asp:BoundField HeaderText="Last Name" DataField="LastName" />
              <asp:BoundField HeaderText="Title" DataField="Title" />
          </columns>
      </asp:GridView>

      <asp:Label
          id="Label1"
          runat="server">
      </asp:Label>

    </form>
  </body>
</html>
<%@Page  Language="VB" %>
<%@Import Namespace="System.Web.Mail" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

 Sub OnDSUpdatedHandler(ByVal source As Object, ByVal e As SqlDataSourceStatusEventArgs)
    If e.AffectedRows > 0 Then
        ' Perform any additional processing, such as setting a status label.
        Label1.Text = Request.LogonUserIdentity.Name & _
            " changed user information successfully!"
    Else
        Label1.Text = "No data updated!"
    End If
 End Sub 'OnDSUpdatedHandler

</script>


<html xmlns="http://www.w3.org/1999/xhtml" >
  <head runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
    <!-- This example uses a Northwind database that is hosted by an ODBC-compliant
         database. To run this sample, create an ODBC DSN to any database that hosts
         the Northwind database, including Microsoft SQL Server or Microsoft Access,
         change the name of the DSN in the ConnectionString, and view the page.
    -->
    <form id="form1" runat="server">

      <asp:SqlDataSource
          id="SqlDataSource1"
          runat="server"
          ProviderName="System.Data.Odbc"
          DataSourceMode="DataSet"
          ConnectionString="dsn=myodbc3dsn;"
          SelectCommand="SELECT EmployeeID,FirstName,LastName,Title FROM Employees"
          UpdateCommand="Update Employees SET FirstName=?,LastName=?,Title=? WHERE EmployeeID=?"
          OnUpdated="OnDSUpdatedHandler">
      </asp:SqlDataSource>

      <asp:GridView
          id="GridView1"
          runat="server"
          AutoGenerateColumns="False"
          DataKeyNames="EmployeeID"
          AutoGenerateEditButton="True"
          DataSourceID="SqlDataSource1">
          <columns>
              <asp:BoundField HeaderText="First Name" DataField="FirstName" />
              <asp:BoundField HeaderText="Last Name" DataField="LastName" />
              <asp:BoundField HeaderText="Title" DataField="Title" />
          </columns>
      </asp:GridView>

      <asp:Label
          id="Label1"
          runat="server">
      </asp:Label>

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

備註

UpdateCommand表示 SQL 查詢或預存程式的名稱,並由方法使用Update

由於不同的資料庫產品使用不同的 SQL,SQL 字串的語法須視目前所使用的 ADO.NET 提供者 (可由 ProviderName 屬性識別) 而定。 如果 SQL 字串是參數型查詢或命令,參數的替代符號亦須視目前所使用的 ADO.NET 提供者而定。 例如,如果提供者是 System.Data.SqlClient,這是 類別的預設提供者 SqlDataSource ,則 參數的佔位元為 '@parameterName'。 不過,如果提供者設定為 System.Data.OdbcSystem.Data.OleDb,則 參數的佔位元為 '?'。 如需參數化 SQL 查詢和命令的詳細資訊,請參閱 搭配 SqlDataSource 控制項使用參數

如果數據源支援預存程式,此屬性 UpdateCommand 可以是 SQL 字串或預存程式的名稱。

屬性UpdateCommand會委派給UpdateCommandSqlDataSource 控件相關聯之 對象的屬性SqlDataSourceView

重要

基於安全性目的, UpdateCommand 屬性不會儲存為檢視狀態。 由於可以在用戶端上譯碼檢視狀態的內容,因此將資料庫結構的敏感性資訊儲存在檢視狀態可能會導致資訊洩漏弱點。

重要

值會插入參數而不進行驗證,這是潛在的安全性威脅。 在執行查詢之前, Filtering 請使用 事件來驗證參數值。 如需詳細資訊,請參閱 Script Exploits Overview (指令碼攻擊概觀)。

適用於

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