asp.net 2.0中一次性更新所有GRIDVIEW的记录

最新推荐文章于 2022-01-14 23:18:32 发布

iteye_11848

最新推荐文章于 2022-01-14 23:18:32 发布

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本文介绍了在ASP.NET中使用GridView控件进行数据编辑时，如何批量更新修改过的记录。提供了两种方法，一种是通过sqldatasource逐条更新，另一种是组合SQL语句一次性更新所有记录，后者效率更高。

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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#" %>

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>

<title>Untitled Page</title>

</head>

<body>

<div>

<asp:GridView ID="GridView1" Runat="server" DataSourceID="SqlDataSource1" DataKeyNames="CustomerID"

AutoGenerateColumns="False">

<asp:TemplateField SortExpression="CustomerID" HeaderText="CustomerID">

<asp:TextBox Runat="server" Text='<%# Bind("CustomerID") %>' ID="TextBox1"></asp:TextBox>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField SortExpression="CompanyName" HeaderText="CompanyName">

<asp:TextBox Runat="server" Text='<%# Bind("CompanyName") %>' ID="TextBox2"></asp:TextBox>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField SortExpression="ContactName" HeaderText="ContactTitle">

<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 %>">

<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" %>

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>

<title>Untitled Page</title>

</head>

<body>

<div>

<asp:GridView ID="GridView1" Runat="server" DataKeyNames="CustomerID"

AutoGenerateColumns="False">

<asp:TemplateField SortExpression="CustomerID" HeaderText="CustomerID">

<asp:TextBox Runat="server" Text='<%# Bind("CustomerID") %>' ID="TextBox1"></asp:TextBox>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField SortExpression="CompanyName" HeaderText="CompanyName">

<asp:TextBox Runat="server" Text='<%# Bind("CompanyName") %>' ID="TextBox2"></asp:TextBox>

</ItemTemplate>

</asp:TemplateField>

<asp:TemplateField SortExpression="ContactName" HeaderText="ContactTitle">

<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>