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问答

请教OnItemCreated和OnItemDataBound的问题？

zl13 2004-10-28 08:37:20

我在OnItemCreated里
Dim myMake
myMake = e.Item.Cells(2).Controls(0)
就没问题，但我在OnItemDataBound里也
Dim myMake
myMake = e.Item.Cells(2).Controls(0)
就告诉我超过边界？不明白，请高手解释一下

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zl13 2004-10-28

成功了，谢谢大家，今天我提了很多问题，同时也学会了很多问题，多谢大家了

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活靶子哥哥 2004-10-28

我测试了一下
两个方法内只要
if(e.Item.ItemIndex >= 0)判断后在操作就正常
看来当ItemIndex= -1 的时候这两个方法也是执行的
你试试用
if(e.Item.ItemIndex >= 0)
判断一下，再进行你的操作

<%@ Page Language="C#" Debug="true" %>
<%@ Import NameSpace="System.Data"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="gb2312">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<meta http-equiv="Content-Language" content="gb2312" />
<meta content="all" name="robots" />
<meta name="Author" content="huobazi@aspxboy.com ,活靶子" />
<meta name="Copyright" content="www.AspxBoy.Com,自由版权,任意转载." />
<meta name="Description" content="www.AspxBoy.Com" />
<meta name="Keywords" content="www.AspxBoy.Com,活靶子,huobazi" />
<title> New New Document</title>
<script language="c#" runat="server">

protected void Item_DataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
/*
if(e.Item.ItemIndex >= 0)
{
Response.Write( e.Item.Cells[0].Controls[0].GetType() + "<br />");
Response.Write( e.Item.Cells[0].Controls[1].GetType() + "<br />");
}*/
}

protected void Item_Created(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
if(e.Item.ItemIndex >= 0)
{
Response.Write( e.Item.Cells[0].Controls[0].GetType() + "<br />");
Response.Write( e.Item.Cells[0].Controls[1].GetType() + "<br />");
}
}

protected void BindGrid()
{
DataTable dt = new DataTable();
DataRow dr;
dt.Columns.Add(new DataColumn("IntegerValue", typeof(Int32)));
dt.Columns.Add(new DataColumn("StringValue", typeof(string)));
dt.Columns.Add(new DataColumn("CurrencyValue", typeof(double)));
for (int i = 0; i < 10; i++)
{
dr = dt.NewRow();
dr[0] = i;
dr[1] = "Item " + i.ToString();
dr[2] = 1.23 * (i+1);
dt.Rows.Add(dr);
}

DataView dv = new DataView(dt);
dg.DataSource = dv;
dg.DataBind();
}

protected void Page_Load(Object sender, EventArgs e)
{
if (!IsPostBack)
{
BindGrid();
}
}

</script>
</head>

<body>
<form id="aa" runat="server">

<asp:datagrid id="dg" runat="server"
OnItemDataBound="Item_DataBound"
OnItemCreated="Item_Created"
AutoGenerateColumns="false"
ShowHeader="false"
ShowFooter="false"
>
<columns>
<asp:TemplateColumn HeaderText="TemplateColumn">
<ItemTemplate>
<asp:TextBox runat="server"
Text='<%# DataBinder.Eval(Container.DataItem, "IntegerValue") %>' >
</asp:TextBox>
</ItemTemplate>
</asp:TemplateColumn>
</columns>
</asp:datagrid>

</form>
</body>
</html>

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