本文介绍了GridView EditTemplate中的DropDownList未触发selectedIndexChanged事件的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
guyz我非常困在这里，我在gridview上有一个drowpdownlist在编辑模板上，并希望rais其selectedindexchanged事件获得新选择的索引值。
当我从下拉列表中选择任何项目时
，页面发布回来然后没有任何反应。
包含网格的面板由ajax modalpopupextender显示。
这是我的.aspx代码
guyz i am badly stuck here, i have a drowpdownlist in gridview on edit template and want to rais its selectedindexchanged event to get the new selected index value.
when i select any item from the dropdown, page posts back and then nothing happens.
panel which contains grid is showing by ajax modalpopupextender.
here is my .aspx code
<asp:Panel ID="OrderPanel" runat="server" CssClass="Contents" Height="325px" Width="600px"
Style="display: none">
<asp:UpdatePanel ID="OrderDetailPanel" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<div class="LeftAlign">
<div id="InnerDiv" class="RirghAlign">
<asp:Label runat="server" ID="IdLable" Text="Id: " CssClass="Lable"></asp:Label>
<asp:TextBox runat="server" ID="IdTextBox" CssClass="TextBox"> </asp:TextBox>
<br />
<asp:Label runat="server" ID="DateLabel" Text="Date: " CssClass="Lable"></asp:Label>
<asp:TextBox runat="server" ID="DateTextBox" CssClass="TextBox" AutoCompleteType="None"> </asp:TextBox>
<Ajax:CalendarExtender ID="CalenderExtender" TargetControlID="DateTextBox" Format="dd/MM/yyyy"
runat="server">
</Ajax:CalendarExtender>
<br />
<asp:Label runat="server" ID="CustomerIdLabel" Text="Customer:" CssClass="Lable"></asp:Label>
<asp:TextBox runat="server" ID="InsertCustomerIdTextBox" CssClass="TextBox"> </asp:TextBox>
<br />
</div>
</div>
<div class="LeftAlign">
<div class="RirghAlign">
<asp:Label runat="server" ID="CommentsLabel" Text="Comments:" CssClass="Lable"></asp:Label>
<asp:TextBox runat="server" ID="InsertCommentsTextBox" CssClass="TextBox" TextMode="MultiLine">
</asp:TextBox>
</div>
</div>
<asp:GridView ID="OrderDetailsGridView" runat="server" AllowPaging="True" ViewStateMode="Disabled"
CssClass="mGrid" PagerStyle-CssClass="pgr" AlternatingRowStyle-CssClass="alt"
AutoGenerateColumns="False" DataKeyNames="Id" EmptyDataText="No record found for this order"
OnRowCommand="OrderDetailsGridView_RowCommand" PageSize="5" OnRowEditing="OrderDetailsGridView_RowEditing"
OnPageIndexChanging="OrderDetailsGridView_PageIndexChanging" OnRowCancelingEdit="OrderDetailsGridView_RowCancelingEdit"
OnRowUpdating="OrderDetailsGridView_RowUpdating" OnRowDataBound="OrderDetailsGridView_RowDataBound">
<AlternatingRowStyle CssClass="alt"></AlternatingRowStyle>
<Columns>
<asp:TemplateField HeaderText="Prduct Id">
<EditItemTemplate>
<asp:DropDownList ID="ProductIDDropDownList" DataValueField="Id" DataTextField="ProductName"
ViewStateMode="Enabled" runat="server" Width="100%" AutoPostBack="false" OnSelectedIndexChanged="ProductIDDropDownList_SelectedIndexChanged">
</asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("PrductId_FK") %>' ViewStateMode="Enabled"></asp:Label>
</ItemTemplate>
<ControlStyle Width="80px" />
</asp:TemplateField>
<asp:BoundField DataField="EmployeeId" HeaderText="Employee Id" ControlStyle-Width="100%">
<ControlStyle Width="30px"></ControlStyle>
</asp:BoundField>
<asp:BoundField DataField="PQuantity" HeaderText="Purchase Quantity" ControlStyle-Width="100%">
<ControlStyle Width="30px"></ControlStyle>
</asp:BoundField>
<asp:BoundField DataField="TotalPrice" HeaderText="Total Price" ControlStyle-Width="100%">
<ControlStyle Width="60px"></ControlStyle>
</asp:BoundField>
<asp:TemplateField HeaderText="Placement Date">
<EditItemTemplate>
<asp:TextBox ID="OrderDetailsDateTimeTextBox" runat="server" Text='<%# Bind("PlacementDate") %>'></asp:TextBox>
<Ajax:CalendarExtender ID="CalenderExtender" TargetControlID="OrderDetailsDateTimeTextBox"
Format="dd/MM/yyyy" runat="server">
</Ajax:CalendarExtender>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text='<%# Bind("PlacementDate", "{0:dd/MM/yyyy}") %>'></asp:Label>
</ItemTemplate>
<ControlStyle Width="80px" />
</asp:TemplateField>
<asp:TemplateField HeaderText="Comments">
<EditItemTemplate>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Comments") %>' TextMode="MultiLine"></asp:TextBox>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label3" runat="server" Text='<%# Bind("Comments") %>'></asp:Label>
</ItemTemplate>
<ControlStyle Width="150px" />
</asp:TemplateField>
<asp:CommandField ShowEditButton="True" Visible="true" ControlStyle-Width="100%"
CausesValidation="False">
<ControlStyle Width="50px"></ControlStyle>
</asp:CommandField>
</Columns>
<EditRowStyle />
<PagerStyle CssClass="pgr"></PagerStyle>
</asp:GridView>
<asp:Button ID="InserDetailsButton" runat="server" Text="New Row" CssClass="Button"
OnClick="InserDetailsButton_Click" />
<asp:Button ID="SaveChangesButton" runat="server" Text="Save Changes" CssClass="Button"
OnClick="SaveChangesButton_Click" />
<asp:Button ID="PopupCancelButton" runat="server" Text="Cancel" CssClass="Button"
OnClick="PopupCancelButton_Click" />
</ContentTemplate>
</asp:UpdatePanel>
</asp:Panel>
and here is .Cs code
and here is .Cs code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using ObjectLayer;
using OrderPlacementBLL;
using AjaxControlToolkit;
using System.Web.Services;
namespace Order_Placement.WebForms.Orders
{
public partial class OrdersListing : System.Web.UI.Page
{
List<order> OrderList;
OrdersBLL OrderBLL;
List<products> products;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
BindOrderListDataGrid();
products = new ProductsBLL().GetAllProducts();
ViewState["product"] = products;
}
}
protected void OrderListingGridView_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "Edit")
{
BindOrderListDataGrid();
}
}
protected void OrderListingGridView_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
OrderListingGridView.PageIndex = e.NewPageIndex;
BindOrderListDataGrid();
}
void BindOrderListDataGrid()
{
OrderList = new List<order>();
OrderBLL = new OrdersBLL();
OrderList = OrderBLL.GetAllOrders();
OrderListingGridView.DataSource = OrderList;
OrderListingGridView.DataBind();
}
void BindOrderDetailsDataGrid()
{
if (Session["order"] != null)
{
Order temporder = (Order)Session["order"];
OrderDetailsGridView.DataSource = temporder.lstOrderDetails;
OrderDetailsGridView.DataBind();
OrderModalPopup.Show();
}
}
protected void OrderListingGridView_RowEditing(object sender, GridViewEditEventArgs e)
{
OrderModalPopup.Show();
IdTextBox.Text = OrderListingGridView.Rows[Convert.ToInt32(e.NewEditIndex)].Cells[0].Text;
DateTextBox.Text = OrderListingGridView.Rows[Convert.ToInt32(e.NewEditIndex)].Cells[1].Text;
InsertCustomerIdTextBox.Text = OrderListingGridView.Rows[Convert.ToInt32(e.NewEditIndex)].Cells[2].Text;
InsertCommentsTextBox.Text = OrderListingGridView.Rows[Convert.ToInt32(e.NewEditIndex)].Cells[3].Text;
OrderBLL = new OrdersBLL();
Order ord = new Order();
ord.lstOrderDetails = OrderBLL.GetDetails(Convert.ToInt32(IdTextBox.Text));
Session["order"] = ord;
BindOrderDetailsDataGrid();
e.Cancel = true;
}
protected void EditButton_Click(object sender, EventArgs e)
{
OrderModalPopup.Show();
}
protected void btn_Click(object sender, EventArgs e)
{
//
}
protected void OrderDetailsGridView_RowCommand(object sender, GridViewCommandEventArgs e)
{
BindOrderDetailsDataGrid();
if (e.CommandName.ToLower() == "update")
{
GridViewRow row = OrderDetailsGridView.Rows[Convert.ToInt32(e.CommandArgument)];
DropDownList ProductIDDropDownList = row.FindControl("ProductIDDropDownList") as DropDownList;
}
}
protected void SaveChangesButton_Click(object sender, EventArgs e)
{
}
protected void InserDetailsButton_Click(object sender, EventArgs e)
{
if( Session["order"] != null )
{
Order temporder = (Order)Session["order"];
temporder.lstOrderDetails.Add(new OrderDetails());
Session["order"] = temporder;
BindOrderDetailsDataGrid();
}
}
protected void OrderDetailsGridView_RowEditing(object sender, GridViewEditEventArgs e)
{
OrderDetailsGridView.EditIndex = e.NewEditIndex;
GridViewRow row = OrderDetailsGridView.Rows[e.NewEditIndex];
DropDownList ProductIDDropDownList = row.FindControl("ProductIDDropDownList") as DropDownList;
if(ProductIDDropDownList != null)
{
if (ViewState["product"] != null)
{
ProductIDDropDownList.DataSource = ViewState["product"] as List<products>;
ProductIDDropDownList.DataBind();
ProductIDDropDownList.SelectedIndex = -1;
ProductIDDropDownList.SelectedIndexChanged += new EventHandler(ProductIDDropDownList_SelectedIndexChanged);
}
}
}
protected void OrderDetailsGridView_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
OrderDetailsGridView.PageIndex = e.NewPageIndex;
BindOrderDetailsDataGrid();
}
protected void OrderDetailsGridView_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
}
protected void OrderDetailsGridView_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
//GridView temp = (GridView)sender;
//GridViewRow row = temp.Rows[e.RowIndex];
//DropDownList ProductIDDropDownList = row.FindControl("ProductIDDropDownList") as DropDownList;
}
protected void OrderDetailsGridView_DataBinding(object sender, EventArgs e)
{
}
protected void OrderDetailsGridView_DataBound(object sender, EventArgs e)
{
}
protected void OrderDetailsGridView_RowCreated(object sender, GridViewRowEventArgs e)
{
}
protected void OrderDetailsGridView_RowDataBound(object sender, GridViewRowEventArgs e)
{
}
protected void ProductIDDropDownList_SelectedIndexChanged(object sender, EventArgs e)
{
}
protected void PopupCancelButton_Click(object sender, EventArgs e)
{
OrderDetailsGridView.EditIndex = -1;
OrderModalPopup.Hide();
}
}
}推荐答案
<asp:dropdownlist id="ProductIDDropDownList" datavaluefield="Id" datatextfield="ProductName" viewstatemode="Enabled" runat="server" width="100%" autopostback="True" onselectedindexchanged="ProductIDDropDownList_SelectedIndexChanged" xmlns:asp="#unknown"></asp:dropdownlist>
Then add trigger to update panel as you are using update panel with conditional mode
Then add trigger to update panel as you are using update panel with conditional mode
<asp:updatepanel id="OrderDetailPanel" runat="server" xmlns:asp="#unknown">
<triggers>
<asp:asyncpostbacktrigger controlid="OrderDetailsGridView" />
</triggers>
<contenttemplate>
</contenttemplate></asp:updatepanel>这篇关于GridView EditTemplate中的DropDownList未触发selectedIndexChanged事件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！