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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： <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" />
</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" /> </div> </form> </body> </html> |
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