一次更新Datagrid 中多列数据

王朝asp·作者佚名  2006-01-30
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一次更新Datagrid 中多列数据

在datagrid中一般我们只需一列列的更新数据,但有时需一次更新所有列中数据,提高数据编辑效率。

为了方便演示用xml文件做为数据源

xml文件:(UserInfo.xml)

<?xml version="1.0" standalone="yes"?>

<UserInfos>

<UserInfo>

<Email>some@you.net</Email>

<Name>me</Name>

<TEL>0123456</TEL>

</UserInfo>

<UserInfo>

<Email>youraddress@you.com</Email>

<Name>he</Name>

<TEL>7894563</TEL>

</UserInfo>

<UserInfo>

<Email>youraddress@you.com</Email>

<Name>222</Name>

<TEL>123342</TEL>

</UserInfo>

<UserInfo>

<Email>youraddress@you.com</Email>

<Name>haha</Name>

<TEL>3545445</TEL>

</UserInfo>

<UserInfo>

<Email>youraddress@you.com</Email>

<Name>sam</Name>

<TEL>879563</TEL>

</UserInfo>

</UserInfos>

页面代码:

<form id="Form1" method="post" runat="server">

<asp:DataGrid id="DGrid" runat="server" ShowFooter="True" GridLines="None" CellPadding="2" AutoGenerateColumns="False">

<HeaderStyle Font-Bold="True"></HeaderStyle>

<Columns>

<asp:TemplateColumn HeaderText="名字">

<ItemTemplate>

<asp:TextBox id=Name runat="server" Width="109px" Text='<%# DataBinder.Eval(Container, "DataItem.Name") %>'>

</asp:TextBox>

</ItemTemplate>

<FooterTemplate>

<asp:TextBox id="NewName" runat="server" Width="109px"></asp:TextBox>

</FooterTemplate>

</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="电话">

<ItemTemplate>

<asp:TextBox id=TEL runat="server" Width="109px" Text='<%# DataBinder.Eval(Container, "DataItem.TEL") %>'>

</asp:TextBox>

</ItemTemplate>

<FooterTemplate>

<asp:TextBox id="NewTEL" runat="server" Width="109px"></asp:TextBox>

</FooterTemplate>

</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="Email">

<ItemTemplate>

<asp:TextBox id=Email runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.Email") %>'>

</asp:TextBox>

</ItemTemplate>

<FooterTemplate>

<asp:TextBox id="NewEmail" runat="server"></asp:TextBox>

</FooterTemplate>

</asp:TemplateColumn>

<asp:TemplateColumn HeaderText="删除">

<ItemStyle HorizontalAlign="Center"></ItemStyle>

<ItemTemplate>

<asp:CheckBox Runat="server" ID="chkDelete"></asp:CheckBox>

</ItemTemplate>

<FooterStyle HorizontalAlign="Center"></FooterStyle>

<FooterTemplate>

<asp:LinkButton Runat="server" Text="增加" CommandName="Add" ID="Linkbutton1"></asp:LinkButton>

</FooterTemplate>

</asp:TemplateColumn>

</Columns>

</asp:DataGrid>

<asp:Button id="btnUpdate" style="Z-INDEX: 101; LEFT: 8px; POSITION: absolute; TOP: 208px" runat="server"

Text="更新"></asp:Button>

</form>

后台代码:

private DataSet dsUser;//定义dsUser

private void Page_Load(object sender, System.EventArgs e)

{

// 读取XML 文件.到dataset中

dsUser = new DataSet();

dsUser.ReadXml(Server.MapPath("UserInfo.xml"));

if (!Page.IsPostBack )

{

BindData();

}

}

private void BindData()

{

// datagrid绑定dataset

DataView dv = new DataView(dsUser.Tables["UserInfo"]);

DGrid.DataSource = dv;

DGrid.DataBind();

}

//把dataset保存到xml文件

private void Save()

{

dsUser.WriteXml(Server.MapPath("UserInfo.xml"));

}

private void DGrid_ItemCommand(object source , System.Web.UI.WebControls.DataGridCommandEventArgs e)

{

//增加一行到dataset中。使用了arrary结构

if (e.CommandName == "Add")

{

string[] sUser = {"", "", ""};

sUser[0] = ((TextBox)e.Item.FindControl("NewEmail")).Text;

sUser[1] = ((TextBox)e.Item.FindControl("NewName")).Text;

sUser[2] = ((TextBox)e.Item.FindControl("NewTEL")).Text;

dsUser.Tables["UserInfo"].Rows.Add(sUser);

Save();

}

BindData();

}

private void btnUpdate_Click(object sender, System.EventArgs e)

{

// 遍历datagrid中所有列.

foreach (DataGridItem di in DGrid.Items)

{

//不遍历datagrid中的 header or footer.

if (di.ItemType == ListItemType.Item || di.ItemType == ListItemType.AlternatingItem)

{

DataRow dr = dsUser.Tables["UserInfo"].Rows.Find(DGrid.DataKeys[di.ItemIndex]);

// 如果删除被选中.

if (((CheckBox)di.FindControl("chkDelete")).Checked)

{

dsUser.Tables["UserInfo"].Rows.Remove(dr);

}

else

{

// 更新

dr["Email"] = ((TextBox)di.FindControl("Email")).Text;

dr["Name"] = ((TextBox)di.FindControl("Name")).Text;

dr["TEL"] = ((TextBox)di.FindControl("TEL")).Text;

}

}

}

// 如果有改动

if (dsUser.HasChanges())

{

Save();

}

BindData();

}

 
 
 
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