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asp.net 2.0中一次性更新所有GRIDVIEW的記錄

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asp.net 2.0中一次性更新所有GRIDVIEW的記錄           在asp.net 2.0中，gridview控制項是十分不錯的控制項。有的時候，可能一個GRIDVIEW控制項中的各行都是文字框，如何一次性更新所有修改過的記錄呢？有兩種方法，一種是使用sqldatasource來更新所有記錄，但這個方法比較慢，因為每更新一條記錄都要建立資料連線並執行updatecommand,會影響效能，但還是先來看下實現方法：

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

<script runat="server">
  
   void Button1_Click(object sender, EventArgs e)
   {
      for (int i = 0; i < GridView1.Rows.Count; i++)
      {
        GridViewRow row = GridView1.Rows;
        SqlDataSource1.UpdateParameters[0].DefaultValue = ((TextBox)row.Cells[0].FindControl("TextBox2")).Text;
        SqlDataSource1.UpdateParameters[1].DefaultValue = ((TextBox)row.Cells[1].FindControl("TextBox3")).Text;
        SqlDataSource1.UpdateParameters[2].DefaultValue = GridView1.DataKeys.Value.ToString();
        SqlDataSource1.Update();
      }
   }  
  
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
   <title>Untitled Page</title>
</head>
<body>
   <form id="form1" runat="server">
   <div>
      <asp:GridView ID="GridView1" Runat="server" DataSourceID="SqlDataSource1" DataKeyNames="CustomerID"
        AutoGenerateColumns="False">
        <Columns>
           <asp:TemplateField SortExpression="CustomerID" HeaderText="CustomerID">
           <ItemTemplate>
              <asp:TextBox Runat="server" Text='<%# Bind("CustomerID") %>' ID="TextBox1"></asp:TextBox>
           </ItemTemplate>
           </asp:TemplateField>
           <asp:TemplateField SortExpression="CompanyName" HeaderText="CompanyName">
              <ItemTemplate>
                <asp:TextBox Runat="server" Text='<%# Bind("CompanyName") %>' ID="TextBox2"></asp:TextBox>
              </ItemTemplate>
           </asp:TemplateField>
           <asp:TemplateField SortExpression="ContactName" HeaderText="ContactTitle">
              <ItemTemplate>
                <asp:TextBox Runat="server" Text='<%# Bind("ContactTitle") %>' ID="TextBox3"></asp:TextBox>
              </ItemTemplate>
           </asp:TemplateField>
        </Columns>
      </asp:GridView>
      <asp:SqlDataSource ID="SqlDataSource1" Runat="server"
        SelectCommand="SELECT [CustomerID], [CompanyName], [ContactName], [ContactTitle] FROM [Customers]"
        UpdateCommand="UPDATE [Customers] SET [CompanyName] = @CompanyName, [ContactTitle] = @ContactTitle WHERE [CustomerID] = @CustomerID"
        ConnectionString="<%$ ConnectionStrings:AppConnectionString1 %>">
        <UpdateParameters>
           <asp:Parameter Type="String" Name="CompanyName"></asp:Parameter>
           <asp:Parameter Type="String" Name="ContactTitle"></asp:Parameter>
           <asp:Parameter Type="String" Name="CustomerID"></asp:Parameter>
        </UpdateParameters>
      </asp:SqlDataSource>
      <asp:Button ID="Button1" Runat="server" Text="Button"  />
  
   </div>
   </form>
</body>
</html>


　　另外一個方法是用SQL語句來進行的，速度比較快，原理也容易理解，下面看看方法

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Text" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<script runat="server">
  
   void Button1_Click(object sender, EventArgs e)
   {
      StringBuilder query = new StringBuilder();
      
      for (int i = 0; i < GridView1.Rows.Count; i++)
      {
        GridViewRow row = GridView1.Rows;
        string value1 = ((TextBox)row.Cells[0].FindControl("TextBox2")).Text.Replace("'","''");
        string value2 = ((TextBox)row.Cells[1].FindControl("TextBox3")).Text.Replace("'","''");
        string value3 = GridView1.DataKeys.Value.ToString();

        query.Append("UPDATE [Customers] SET [CompanyName] = '")
           .Append(value1).Append("' , [ContactTitle] = '")
           .Append(value2).Append("' WHERE [CustomerID] = '")
           .Append(value3).Append("';\n");
        
      }

      SqlConnection con = new SqlConnection(ConfigurationSettings.ConnectionStrings["AppConnectionString1"].ConnectionString);
      SqlCommand command = new SqlCommand(query.ToString(), con);
      con.Open();
      command.ExecuteNonQuery();
      con.Close();
   }

   void Page_Load(object sender, EventArgs e)
   {
      if (!Page.IsPostBack)
      {
        SqlConnection con = new SqlConnection(ConfigurationSettings.ConnectionStrings["AppConnectionString1"].ConnectionString);
        SqlCommand command = new SqlCommand("SELECT [CustomerID], [CompanyName], [ContactName], [ContactTitle] FROM [Customers]", con);

        con.Open();
        GridView1.DataSource = command.ExecuteReader();
        GridView1.DataBind();
        con.Close();
      }
   }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
   <title>Untitled Page</title>
</head>
<body>
   <form id="form1" runat="server">
   <div>
      <asp:GridView ID="GridView1" Runat="server" DataKeyNames="CustomerID"
        AutoGenerateColumns="False">
        <Columns>
           <asp:TemplateField SortExpression="CustomerID" HeaderText="CustomerID">
           <ItemTemplate>
              <asp:TextBox Runat="server" Text='<%# Bind("CustomerID") %>' ID="TextBox1"></asp:TextBox>
           </ItemTemplate>
           </asp:TemplateField>
           <asp:TemplateField SortExpression="CompanyName" HeaderText="CompanyName">
              <ItemTemplate>
                <asp:TextBox Runat="server" Text='<%# Bind("CompanyName") %>' ID="TextBox2"></asp:TextBox>
              </ItemTemplate>
           </asp:TemplateField>
           <asp:TemplateField SortExpression="ContactName" HeaderText="ContactTitle">
              <ItemTemplate>
                <asp:TextBox Runat="server" Text='<%# Bind("ContactTitle") %>' ID="TextBox3"></asp:TextBox>
              </ItemTemplate>
           </asp:TemplateField>
        </Columns>
      </asp:GridView>
    
      <asp:Button ID="Button1" Runat="server" Text="Button"  />
  
   </div>
   </form>
</body>
</html>

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相關關鍵詞：
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