在asp.net2.0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：
<%@PageLanguage="C#"%>
<scriptrunat="server">
voidButton1_Click(objectsender,EventArgse)
{
for(inti=0;i<GridView1.Rows.Count;i++)
{
GridViewRowrow=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>
<htmlxmlns="
<headrunat="server">
<title>UntitledPage</title>
</head>
<body>
<formid="form1"runat="server">
<div>
<asp:GridViewID="GridView1"Runat="server"DataSourceID="SqlDataSource1"DataKeyNames="CustomerID" AutoGenerateColumns="False">
<Columns>
<asp:TemplateFieldSortExpression="CustomerID"HeaderText="CustomerID">
<ItemTemplate>
<asp:TextBoxRunat="server"Text='<%#Bind("CustomerID")%>'ID="TextBox1"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateFieldSortExpression="CompanyName"HeaderText="CompanyName">
<ItemTemplate>
<asp:TextBoxRunat="server"Text='<%#Bind("CompanyName")%>'ID="TextBox2"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateFieldSortExpression="ContactName"HeaderText="ContactTitle">
<ItemTemplate>
<asp:TextBoxRunat="server"Text='<%#Bind("ContactTitle")%>'ID="TextBox3"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:SqlDataSourceID="SqlDataSource1"Runat="server"
SelectCommand="SELECT[CustomerID],[CompanyName],[ContactName],[ContactTitle]FROM[Customers]"
UpdateCommand="UPDATE[Customers]SET[CompanyName]=@CompanyName,[ContactTitle]=@ContactTitleWHERE[CustomerID]=@CustomerID"
ConnectionString="<%$ConnectionStrings:AppConnectionString1%>">
<UpdateParameters>
<asp:ParameterType="String"Name="CompanyName"></asp:Parameter>
<asp:ParameterType="String"Name="ContactTitle"></asp:Parameter>
<asp:ParameterType="String"Name="CustomerID"></asp:Parameter>
</UpdateParameters>
</asp:SqlDataSource>
<asp:ButtonID="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
<%@PageLanguage="C#"%>
<%@ImportNamespace="System.Text"%>
<%@ImportNamespace="System.Data.SqlClient"%>
<scriptrunat="server">
voidButton1_Click(objectsender,EventArgse)
{
StringBuilderquery=newStringBuilder();
for(inti=0;i<GridView1.Rows.Count;i++)
{
GridViewRowrow=GridView1.Rows[i];
stringvalue1=((TextBox)row.Cells[0].FindControl("TextBox2")).Text.Replace("'","''");
stringvalue2=((TextBox)row.Cells[1].FindControl("TextBox3")).Text.Replace("'","''");
stringvalue3=GridView1.DataKeys[i].Value.ToString();
query.Append("UPDATE[Customers]SET[CompanyName]='")
.Append(value1).Append("',[ContactTitle]='")
.Append(value2).Append("'WHERE[CustomerID]='")
.Append(value3).Append("';\n");
}
SqlConnectioncon=newSqlConnection(ConfigurationSettings.ConnectionStrings["AppConnectionString1"].ConnectionString);
SqlCommandcommand=newSqlCommand(query.ToString(),con);
con.Open();
command.ExecuteNonQuery();
con.Close();
}
voidPage_Load(objectsender,EventArgse)
{
if(!Page.IsPostBack)
{
SqlConnectioncon=newSqlConnection(ConfigurationSettings.ConnectionStrings["AppConnectionString1"].ConnectionString);
SqlCommandcommand=newSqlCommand("SELECT[CustomerID],[CompanyName],[ContactName],[ContactTitle]FROM[Customers]",con);
con.Open();
GridView1.DataSource=command.ExecuteReader();
GridView1.DataBind();
con.Close();
}
}
</script>
<htmlxmlns="">
<headrunat="server">
<title>UntitledPage</title>
</head>
<body>
<formid="form1"runat="server">
<div>
<asp:GridViewID="GridView1"Runat="server"DataKeyNames="CustomerID"
AutoGenerateColumns="False">
<Columns>
<asp:TemplateFieldSortExpression="CustomerID"HeaderText="CustomerID">
<ItemTemplate>
<asp:TextBoxRunat="server"Text='<%#Bind("CustomerID")%>'ID="TextBox1"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateFieldSortExpression="CompanyName"HeaderText="CompanyName">
<ItemTemplate>
<asp:TextBoxRunat="server"Text='<%#Bind("CompanyName")%>'ID="TextBox2"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateFieldSortExpression="ContactName"HeaderText="ContactTitle">
<ItemTemplate>
<asp:TextBoxRunat="server"Text='<%#Bind("ContactTitle")%>'ID="TextBox3"></asp:TextBox>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
<asp:ButtonID="Button1"Runat="server"Text="Button"OnClick="Button1_Click"/>
</div>
</form>
</body>
</html>
