在DataGrid中编辑时,其中一列有2个互动的下拉框,
怎么给下拉框加SelectedIndexChanged事件?为什么在DataGrid的ItemDataBound事件中加
ddl1.SelectedIndexChanged += new System.EventHandler(ddl1_SelectedIndexChanged)但是在ddl1_SelectedIndexChanged中没一点反应谁碰到这种情况,指点一下
怎么给下拉框加SelectedIndexChanged事件?为什么在DataGrid的ItemDataBound事件中加
ddl1.SelectedIndexChanged += new System.EventHandler(ddl1_SelectedIndexChanged)但是在ddl1_SelectedIndexChanged中没一点反应谁碰到这种情况,指点一下
function test(objID)
{
var objDropDown = document.getElementById(objID);
//删除一个选项
if(objDropDown.options.length>1)
objDropDown.options.remove(0);
//增加一个选项
var oOption = document.createElement("OPTION");
objDropDown.options.add(oOption);
oOption.innerText = "adfaegw";
oOption.value = "fgawegaw";
//更改选中行
objDropDown.selectedIndex = objDropDown.options.length-1;
}
</script>
**************************************************
<asp:datagrid id="DataGrid1" style="Z-INDEX: 101; LEFT: 8px; POSITION: absolute; TOP: 8px" runat="server">
<Columns>
<asp:TemplateColumn>
<ItemTemplate>
<asp:DropDownList id="DropDownList1" runat="server">
<asp:ListItem Value="AAA">AAA</asp:ListItem>
<asp:ListItem Value="BBB">BBB</asp:ListItem>
<asp:ListItem Value="CCC">CCC</asp:ListItem>
<asp:ListItem Value="DDD">DDD</asp:ListItem>
</asp:DropDownList>
<asp:DropDownList id="DropDownList2" runat="server">
<asp:ListItem Value="1111111">1111111</asp:ListItem>
<asp:ListItem Value="222222222">222222222</asp:ListItem>
<asp:ListItem Value="3333333">3333333</asp:ListItem>
<asp:ListItem Value="44444444">44444444</asp:ListItem>
</asp:DropDownList>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:datagrid>
********************************************
private void DataGrid1_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
if(e.Item.ItemIndex>-1)
{
DropDownList ddlst1 = e.Item.FindControl("DropDownList1") as DropDownList;
DropDownList ddlst2 = e.Item.FindControl("DropDownList2") as DropDownList;
ddlst1.Attributes.Add("onchange","test('"+ddlst2.ClientID +"');");
}
}
设置它的属性 visiable=false;CmmandName="联动";(自定义)
假设你的两个下拉列表为dropdownlist1,dropdownlist2
//在datagrid的EditCommand事件里加上
Button bt =(Button) e.item.cells[n].FindControl("Button1");
((dropdownlist)e.item.cells[n].FindControl("dropdownlist1")).Attributes.Add("onchange","document.getElementById('"+ bt.ClientID +"').click();");//在datagrid的ItemCommand事件里加上
if(e.CommandName=="联动"
{
// 根据第一个下拉列表的选中值改变第二个下拉列表的数据源
}
aspx的：
<%@ Page language="c#" Codebehind="DataGridDoubleDropDownList.aspx.cs" AutoEventWireup="false" Inherits="CommonFunction.DataGridDoubleDropDownList" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>DataGridDoubleDropDownList</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<FONT face="宋体">
<asp:DataGrid id="dgDoubleDrp" style="Z-INDEX: 101; LEFT: 40px; POSITION: absolute; TOP: 16px"
runat="server" AutoGenerateColumns="False" Width="304px" BorderColor="#3366CC" BorderStyle="None"
BorderWidth="1px" BackColor="White" CellPadding="4">
<SelectedItemStyle Font-Bold="True" ForeColor="#CCFF99" BackColor="#009999"></SelectedItemStyle>
<ItemStyle ForeColor="#003399" BackColor="White"></ItemStyle>
<HeaderStyle Font-Bold="True" ForeColor="#CCCCFF" BackColor="#003399"></HeaderStyle>
<FooterStyle ForeColor="#003399" BackColor="#99CCCC"></FooterStyle>
<Columns>
<asp:TemplateColumn HeaderText="订单号">
<ItemTemplate>
<asp:Label id=lblOrderID runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.OrderID") %>'>
</asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList id=drpOrder runat="server" AutoPostBack="True" OnSelectedIndexChanged="DropDownListChange" DataSource="<%# BindTheOrderID() %>" DataTextField="OrderID">
</asp:DropDownList>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="商品号">
<ItemTemplate>
<asp:Label id=lblproductID runat="server" Text='<%# DataBinder.Eval(Container, "DataItem.ProductID") %>'>
</asp:Label>
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList id=drpProduct runat="server" DataSource="<%# BindTheProductID(orderID) %>" DataTextField="ProductID">
</asp:DropDownList>
</EditItemTemplate>
</asp:TemplateColumn>
<asp:EditCommandColumn ButtonType="LinkButton" UpdateText="更新" CancelText="取消" EditText="编辑"></asp:EditCommandColumn>
</Columns>
<PagerStyle HorizontalAlign="Left" ForeColor="#003399" BackColor="#99CCCC" Mode="NumericPages"></PagerStyle>
</asp:DataGrid></FONT>
</form>
</body>
</HTML>
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Configuration;
namespace CommonFunction
{
/// <summary>
/// DataGridDoubleDropDownList 的摘要说明。
/// </summary>
public class DataGridDoubleDropDownList : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DataGrid dgDoubleDrp;
public string orderID = "";
protected string productID = "";
SqlConnection conn = new SqlConnection();
SqlCommand cmd = new SqlCommand();
private void Page_Load(object sender, System.EventArgs e)
{
//定义数据连接对象,其中数据库连接字符串是在Web.Config文件中定义的
conn = new SqlConnection(ConfigurationSettings.AppSettings["ConnectionSqlServer"].ToString());
//页面初试化时进行数据绑定
if(!IsPostBack)
DataGridDataBind();
}
//进行数据绑定
private void DataGridDataBind()
{
//创建数据适配器对象
SqlDataAdapter da = new SqlDataAdapter("select top 10 Orders.OrderID,ProductID from Orders,[Order Details] where Orders.OrderID = [Order Details].OrderID order by Orders.OrderID",conn);
//创建DataSet对象
DataSet ds = new DataSet();
try
{
//填充数据集
da.Fill(ds,"testTable");
//进行数据绑定
dgDoubleDrp.DataSource = ds.Tables["testTable"];
dgDoubleDrp.DataBind();
}
catch(SqlException error)
{
//输出异常信息
Response.Write(error.ToString());
}
}
public SqlDataReader BindTheOrderID()
{
//定义命令对象
cmd =new SqlCommand("select OrderID from Orders order by OrderID", conn);
//打开数据库联结
conn.Open();
//返回DataReader对象
return cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
public SqlDataReader BindTheProductID(string OrderID)
{
string strSql = ""; if(OrderID != "" && OrderID != null)
{
strSql = "select ProductID from [Order Details] where OrderID = '"+OrderID+"'";
}
else
{
strSql = "select distinct ProductID from [Order Details]";
}
//定义命令对象
cmd =new SqlCommand(strSql, conn);
//打开数据库联结
conn.Open();
//返回DataReader对象
return cmd.ExecuteReader(CommandBehavior.CloseConnection);
} #region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.dgDoubleDrp.CancelCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgDoubleDrp_CancelCommand);
this.dgDoubleDrp.EditCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.dgDoubleDrp_EditCommand);
this.dgDoubleDrp.ItemDataBound += new System.Web.UI.WebControls.DataGridItemEventHandler(this.dgDoubleDrp_ItemDataBound);
this.Load += new System.EventHandler(this.Page_Load); }
#endregion private void dgDoubleDrp_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
//取得当前行的订单号和商品号
orderID = ((Label) e.Item.FindControl("lblOrderID")).Text.Trim();
productID = ((Label) e.Item.FindControl("lblproductID")).Text.Trim();
//设置DataGrid控件的当前编辑项的索引
dgDoubleDrp.EditItemIndex = e.Item.ItemIndex;
//重新进行数据绑定
DataGridDataBind();
} public void DropDownListChange(object sender, System.EventArgs e)
{
//建立drpOrder下拉列表控件的引用对象
DropDownList OrderDrp = (DropDownList) sender;
//取得选择的订单号
orderID = OrderDrp.SelectedItem.Text;
//重新进行数据绑定
DataGridDataBind();
} private void dgDoubleDrp_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
//取消编辑
dgDoubleDrp.EditItemIndex = -1;
DataGridDataBind();
} private void dgDoubleDrp_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
//判断是否是编辑项
if (e.Item.ItemType == ListItemType.EditItem)
{
//找到编辑项中的drpOrder下拉列表控件
DropDownList drpOrderID = (DropDownList) e.Item.FindControl("drpOrder");
//设置在上个操作中drpOrder下拉列表中选中的项
drpOrderID.SelectedIndex = drpOrderID.Items.IndexOf(drpOrderID.Items.FindByText(orderID)); //找到编辑项中的drpProduct下拉列表控件
DropDownList drpProductID = (DropDownList) e.Item.FindControl("drpProduct");
//设置在上个操作中drpProduct下拉列表中选中的项
drpProductID.SelectedIndex = drpProductID.Items.IndexOf(drpProductID.Items.FindByText(productID));
}
} }
}