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asp.net 2.0中一次性更新所有GRIDVIEW的记录

ASP.netASP.netSQL ServerXHTML 
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在asp.net 2.0中，gridview控件是十分不错的控件。有的时候，可能一个GRIDVIEW控件中
的各行都是文本框，如何一次性更新所有修改过的记录呢？有两种方法，一种是使用sqldatasource来更新
所有记录，但这个方法比较慢，因为每更新一条记录都要建立数据连接并执行updatecommand,会影响性能，
但还是先来看下实现方法：
 
<%@ 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[i];
            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[i].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" OnClick="Button1_Click" />&nbsp;
   
    </div>
    </form>
</body>
</html>
  另外一个方法是用组合SQL语句来进行的，速度比较快，原理也容易明白
<%@ 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[i];
            string value1 = ((TextBox)row.Cells[0].FindControl("TextBox2")).Text.Replace("'","''");
            string value2 = ((TextBox)row.Cells[1].FindControl("TextBox3")).Text.Replace("'","''");
            string value3 = GridView1.DataKeys[i].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" OnClick="Button1_Click" />&nbsp;
   
    </div>
    </form>
</body>
</html>


 
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