在平时的实际项目中，为了减少往返提交数据，可以一次编辑 GridView 的所有行，这样大大提高用户使用产品的体验。下面就讲解何一次编辑 GridView 的所有数据行。在下面的例子中，数据库使用《ASP.NET 2.0应用开发技术》一书中Site\App_Data\下的 ASPNET20Book.mdb 数据库。例子中的数据更新方式使用 SqlDataSource 数据源控件的UpdateCommand属性，但此方法同样适用于存储过程，SQL 语句等。
C#
<%@ Page Language="C#" Debug="true" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
string[] ClassNameArray = { "大学", "中学", "高中" };
//初始化原来的值
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
System.Data.DataRowView drv = (System.Data.DataRowView)e.Row.DataItem;
RadioButtonList rbl = (RadioButtonList)e.Row.FindControl("txtGender");
if (rbl != null)
{
if ((bool)drv["Gender"])
{
rbl.Items.FindByText("男").Selected = true;
}
else
{
rbl.Items.FindByText("女").Selected = true;
}
}
DropDownList ddl = (DropDownList)e.Row.FindControl("txtClassName");
if (ddl != null)
{
ddl.Items.FindByText(drv["ClassName"].ToString()).Selected = true;
}
}
}
// 初始化项目列表
protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
DropDownList ddl = (DropDownList)e.Row.FindControl("txtClassName");
ddl.DataSource = ClassNameArray;
ddl.DataBind();
}
}
//处理提交的数据
protected void XianhuiMeng_Click(object sender, EventArgs e)
{
foreach (GridViewRow gvr in GridView1.Rows)
{
string tGender = ((RadioButtonList)gvr.FindControl("txtGender")).SelectedValue;
SqlDataSource1.UpdateParameters.Add(new Parameter("@Title", TypeCode.String, ((TextBox)gvr.FindControl("txtTitle")).Text));
SqlDataSource1.UpdateParameters.Add(new Parameter("@Gender", TypeCode.Boolean, (tGender == "男" ? "True" : "False")));
SqlDataSource1.UpdateParameters.Add(new Parameter("@ClassName",
TypeCode.String, ((DropDownList)gvr.FindControl("txtClassName")).SelectedValue));
SqlDataSource1.UpdateParameters.Add(new Parameter("@id", TypeCode.Int32, GridView1.DataKeys[gvr.DataItemIndex].Value.ToString()));
SqlDataSource1.Update();
SqlDataSource1.UpdateParameters.Clear();
}
Response.Redirect(Request.UrlReferrer.ToString());
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>同时编辑 GridView的 多行</title>
</head>
<body>
<form id="form1" runat="server">
<asp:GridView ID="GridView1" runat="server" Font-Size="12px" CellPadding="3" AutoGenerateColumns="False"
DataKeyNames="id" DataSourceID="SqlDataSource1" OnRowDataBound="GridView1_RowDataBound"
OnRowCreated="GridView1_RowCreated">
<HeaderStyle BackColor="#EDEDED" />
<Columns>
<asp:TemplateField HeaderText="姓名">
<ItemTemplate>
<asp:TextBox ID="txtTitle" runat="server" Text='<%#Eval("Title") %>'></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="性别">
<ItemTemplate>
<asp:RadioButtonList ID="txtGender" runat="server" RepeatColumns="2">
<asp:ListItem Text='男'></asp:ListItem>
<asp:ListItem Text='女'></asp:ListItem>
</asp:RadioButtonList>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField HeaderText="学历">
<ItemTemplate>
<asp:DropDownList ID="txtClassName" runat="server">
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|ASPNET20Book.mdb;Persist Security Info=True"
ProviderName="System.Data.OleDb" SelectCommand="SELECT * FROM [Student]"
UpdateCommand="Update [Student] Set Title = @Title,Gender = @Gender,ClassName=@ClassName Where id=@id">
</asp:SqlDataSource>
<asp:Button ID="Button1" runat="server" Text="保存所有修改" OnClick="XianhuiMeng_Click" />
</form>
</body>
</html>
注意：对于SQL Server 数据库，参数名字不加@。另外注意：不同数据库类型和不同的数据源，UpdateCommand="Update [Student] Set Title = @Title,Gender = @Gender,ClassName=@ClassName Where id=@id"写法和SqlDataSource1.UpdateParameters.Add(new Parameter("@Title", TypeCode.String, ((TextBox)gvr.FindControl("txtTitle")).Text)); 的写法会有所区别。
