我如何以及在哪里输入代码以仅编辑datagridview的一列
[英]How and Where do i enter the code to edit just one column of a datagridview
问题描述
Okay so i have created the datagridview all right and enabled editing to the column as seen in the picture below. 
好的，所以我已经创建了datagridview并启用了对列的编辑，如下图所示。 next i want to write a click event for the edit link such that when it is clicked, only the investigatorID column is available for editing. 接下来，我要为编辑链接编写一个click事件，以便在单击该事件时，仅investigatorID列可用于编辑。 At that instance when changes can be made, i want the investigator column to display a dropdownlist of investigators that can be selected and that selected item be bound to the row on which the edit link was clicked. 在那种情况下，当可以进行更改时，我希望调查者列显示可以选择的调查者下拉列表，并将所选项目绑定到单击了编辑链接的行。
I have the datasource to display the investigatorIDs am only wondering where to write the code for the click even of the edit link and have it do the magic. 我有显示调查者ID的数据源，只是想知道在哪里编写代码（即使是编辑链接也可以单击），并使其发挥作用。
Lets work some Magic people..:) Then i thought again and a better idea came up since i only need the investigator id to be passed into the database to be updated, i edited the design as follows(see picture below) so instead of having the exhibit type and image displayed in the grid view, i rather call up just the exhibit id to which the investigatorID will be assigned it makes more sense when you have a look at the database below: 让工作一些魔术师.. :)然后我再三考虑，因为我只需要将调查员ID传递到数据库中进行更新，便有了一个更好的主意，我按如下方式编辑设计（请参见下图），因此在网格视图中显示展览类型和图像后，我宁愿只调用将分配调查者ID的展览ID，当您查看下面的数据库时，这样做更有意义：
though not fully populated but the concept behind the database is that:1. 尽管没有完全填充，但是数据库背后的概念是：1。 one case may be linked to more than one exhibit (so to say one case has many exhibits and each of those exhibits is assigned an investigating officer that cannot be working on more than 3 exhibits at a time. 一个案例可能与一个以上的展览相关联（也就是说，一个案例包含多个展览，并且每个展览都分配有一位调查人员，而该调查人员一次不能处理三个以上的展览。
so at this stage when investigators are assigned to a case, the caseID,and Exhibit details , are already populated. 因此，在此阶段，当调查人员分配给案例时，已经填充了caseID和Exhibit details。 the Admin that opened the case would already have their ID there and the manager that is yet to assign the case would have their id and the investigators ID to be assigned to the fields. 打开案件的管理员已经在那里有他们的ID，尚未分配案件的经理将有他们的ID和要分配给字段的调查员ID。
Looking at my second design i have been able to create a grid to display only investigators that are working on a 2 or less exhibits. 看看我的第二个设计，我已经能够创建一个网格以仅显示正在处理2个或更少展览的调查员。 which means they are available to be assigned on at least one more exhibit. 这意味着可以将它们分配给至少一个以上的展览。 so to do the assigning, i select a CaseID from the dropdown list which details all cases from the case table(not shown here) and based on the selected case, i display all exhibitID linked to the selected casedID. 为了进行分配，我从下拉列表中选择一个CaseID，该列表详细列出了案例表中所有案例（此处未显示），并基于所选案例，显示了所有链接到所选casedID的展览ID。 from there, the user can select one Exhibit from the dropdownlist and and then select any of the available investigators to assign. 从那里，用户可以从下拉列表中选择一个展览，然后选择要分配的任何可用调查员。 so all i need to do now is when the user clicks the assign button, i want to know where and how i can make the investigatorsID against which the assign button was clicked be passed into the exhibits table as an update and that gridvire (userID, Username aka investigators list) be refereshed so that should the investigatorID that was recently clicked reached its threshold of three exhibits, their investigatorsID and name does not show up. 因此，我现在要做的就是用户单击分配按钮时，我想知道在哪里以及如何使单击分配按钮所依据的调查者ID作为更新以及该gridvire（用户ID，请重新命名用户名，也就是调查者列表），这样，如果最近单击的调查者ID达到其三个展览的阈值，则不会显示其调查者ID和名称。 and at the same time, the exhibit that has already been assigned also does not show up again in the dropdownlist. 同时，已分配的展览品也不会再次出现在下拉列表中。 So in effect, the assign button is clicked, and the ID next to thatis sent to the exhibit table for update and the gridview together with the exhibit dropdownlist is refreshed. 因此，实际上，单击了分配按钮，并将其旁边的ID发送到展览表以进行更新，并且刷新了gridview和展览下拉列表。
there shouldnt be a problem with the grid view since its datais directly binded so a simple exhibitgridview.databind() should work it out and pobably calling the method that previously populated the exhibitdropdownlist would work the refresh for the dropdownlist as well... 网格视图应该没有问题，因为它的数据直接绑定了，所以一个简单的Exhibitiongridview.databind（）应该可以解决这个问题，并且可能调用先前填充的expiredropdownlist的方法也可以对dropdownlist进行刷新...
so the problem here now is how to get the codes behind assign button click for this events to take place. 因此，现在的问题是如何获取分配按钮单击背后的代码以使此事件发生。 please find attached below the code behind for the masterpages (using a nested masterpage) and the code behind and .cs file for the current page where this is supposed to happen. 请在所附代码后找到用于母版页的代码（使用嵌套母版），以及应在当前页面上使用的代码和.cs文件的代码。
First master page (SITE.MASTER) Code behind 第一个母版页（SITE.MASTER）后面的代码
<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Site.master.cs" Inherits="Prototype5.SiteMaster" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head id="Head1" runat="server">
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript">
// $(function () {
// $("#showOpenCasePage").click(function () {
// $("#CaseMainPanel").load("/EntryForms/OpenCase.aspx");
// });
// $("#showAddExhibitPage").click(function () {
// $("#CaseMainPanel").load("/EntryForms/AddExhibit.aspx");
// });
// $("#showOpenCasePage").click(function () {
// $("#CaseManagementMainPanel").load("/EntryForms/OpenCase.aspx");
// });
// $("#showAddExhibitPage").click(function () {
// $("#CaseManagementMainPanel").load("/EntryForms/AddExhibit.aspx");
// });
// $("#showAllocateOfficerPage").click(function () {
// $("#CaseManagementMainPanel").load("/EntryForms/AllocateOfficer.aspx");
// });
// $("#showReallocateOfficerPage").click(function () {
// $("#CaseManagementMainPanel").load("/EntryForms/ReallocateOfficer.aspx");
// });
// $("#showPrioritizeCasePage").click(function () {
// $("#CaseManagementMainPanel").load("/EntryForms/CasePriority.aspx");
// });
// $("#showRecordFindingPage").click(function () {
// $("#InvestigatorMainPanel").load("/EntryForms/RecordFinding.aspx");
// });
// $("#showUpdateStatusPage").click(function () {
// $("#InvestigatorMainPanel").load("/EntryForms/UpdateStatus.aspx");
// });
// });
</script>
<title></title>
<link href="~/Styles/Site.css" rel="stylesheet" type="text/css" />
<asp:ContentPlaceHolder ID="HeadContent" runat="server">
</asp:ContentPlaceHolder>
<script type="text/javascript">
function updateClock() {
var currentTime = new Date();
var currentHours = currentTime.getHours();
var currentMinutes = currentTime.getMinutes();
var currentSeconds = currentTime.getSeconds();
// Pad the minutes and seconds with leading zeros, if required
currentMinutes = (currentMinutes < 10 ? "0" : "") + currentMinutes;
currentSeconds = (currentSeconds < 10 ? "0" : "") + currentSeconds;
// Choose either "AM" or "PM" as appropriate
var timeOfDay = (currentHours < 12) ? "AM" : "PM";
// Convert the hours component to 12-hour format if needed
currentHours = (currentHours > 12) ? currentHours - 12 : currentHours;
// Convert an hours component of "0" to "12"
currentHours = (currentHours == 0) ? 12 : currentHours;
// Compose the string for display
var currentTimeString = currentHours + ":" + currentMinutes + ":" + currentSeconds + " " + timeOfDay;
// Update the time display
document.getElementById("clock").firstChild.nodeValue = currentTimeString;
}
</script>
<style type="text/css">
.style1
{
width: 213px;
}
.menu
{}
.style2
{
width: 100%;
}
.style3
{
width: 264px;
}
.style4
{
width: 291px;
}
</style>
</head>
<body onload="updateClock(); setInterval('updateClock()', 1000 )">
<form id="Form1" runat="server">
<div class="page">
<div class="header">
<div class="title">
<span style="font-size: 5em; font-family:Old English Text MT; color: #FF6600;"><strong>Case Management System</strong></span>
</div>
<div class="clock">
<span id="clock"> </span>
</div>
<div class="clear hideSkiplink">
<table class="style2">
<tr>
<td class="style4" align="center">
<asp:LoginView ID="MasterLoginView" runat="server">
<LoggedInTemplate>
Welcome <span class="bold"><asp:LoginName ID="HeadLoginName" runat="server" />
[ <asp:LoginStatus ID="HeadLoginStatus" runat="server" LogoutAction="Redirect" LogoutText="Log Out" LogoutPageUrl="~/Logout.aspx"/> ]
<%--Welcome:
<span class="bold"><asp:LoginName ID="MasterLoginName" runat="server" /> </span>!--%>
</LoggedInTemplate>
<AnonymousTemplate>
Welcome: Guest
[ <a href="Account/Login.aspx" ID="HeadLoginStatus" runat="server">Log In</a> ]
</AnonymousTemplate>
</asp:LoginView>
</td>
<td class="style3">
</td>
<td valign="top">
<asp:Menu ID="NavigationMenu" runat="server" CssClass="menu" EnableViewState="False"
IncludeStyleBlock="False" Orientation="Horizontal" Height="36px" Width="120px">
<Items>
<asp:MenuItem NavigateUrl="~/Default.aspx" Text="Home"
ImageUrl="~/Images/homeIcon.png"/>
<asp:MenuItem NavigateUrl="~/About.aspx" Text="About"
ImageUrl="~/Images/aboutIcon.png"/>
<asp:MenuItem ImageUrl="~/Images/contactUsIcon.png" NavigateUrl="~/ContactUs.aspx"
Text="Contact Us" Value="Contact Us"></asp:MenuItem>
</Items>
</asp:Menu>
</td>
</tr>
</table>
</div>
</div>
</div>
<div class="page" style="margin-top:5px;height:auto;">
<div style="border-style:solid;">
<table style="width:100%; background-color:#3a4f63">
<tr>
<td class="style1" valign="top">
<p style="padding-left: 4px; padding-right:4px;">
<asp:Button ID="functionButton" runat="server" Text="System Functions"
class="fnctButton" Height="41px" Width="192px" />
<asp:ContentPlaceHolder ID="LeftNavigation" runat="server">
</asp:ContentPlaceHolder>
</p>
</td>
<td rowspan="2" valign="top" align="center">
<asp:ContentPlaceHolder ID="MainContent" runat="server"/>
</td>
</tr>
<tr>
<td class="style1" align="left" valign="top">
<asp:ContentPlaceHolder ID="RightNewsItem" runat="server"/>
</td>
</tr>
</table>
</div>
</div>
<div class="clear">
</div>
<div class="footer">
<span style="font-size: small;color: #FFFFFF;"><strong>Copyright 2011 JustRite Software Inc.</strong></span></div>
</form>
</body>
</html>
Second Master page based on the first one (Manage.Master) 基于第一个母版页的第二个母版页（Manage.Master）
<%@ Master Language="C#" MasterPageFile="~/Site.Master" AutoEventWireup="true" CodeBehind="Manager.master.cs" Inherits="Prototype5.Manager" %>
<asp:Content ID="ManagerHead" ContentPlaceHolderID="HeadContent" runat="server">
</asp:Content>
<asp:Content ID="ManagerLeft" ContentPlaceHolderID="LeftNavigation" runat="server">
<div style="margin-top:20px; margin-bottom:20px;">
<p class="actionButton">
<asp:Button ID="allocateInvestigatorsButton" runat="server"
Text="Allocate Investigators" height="30px" width="135px"
onclick="allocateInvestigatorsButton_Click" />
</p>
<p class="actionButton">
<asp:Button ID="realocateInvestigatorsButton" runat="server"
Text="Reallocate Investigators" Height="30px" Width="135px"
onclick="realocateInvestigatorsButton_Click" />
</p>
<p class="actionButton">
<asp:Button ID="prioritizeCaseButton" runat="server"
Text="Prioritize Case" height="30px" width="135px"
onclick="prioritizeCaseButton_Click" />
</p>
<p class="actionButton">
<asp:Button ID="openCaseButton" runat="server"
Text="Open Case" height="30px" width="135px"
onclick="openCaseButton_Click" />
</p>
<p class="actionButton">
<asp:Button ID="registerExhibitButton" runat="server"
Text="Register Exhibit" height="30px" width="135px"
onclick="registerExhibitButton_Click" />
</p>
</div>
</asp:Content>
<asp:Content ID="ManagerMain" ContentPlaceHolderID="MainContent" runat="server">
<asp:ContentPlaceHolder ID="MainContent" runat="server"/>
</asp:Content>
<asp:Content ID="ManagerRight" ContentPlaceHolderID="RightNewsItem" runat="server">
<asp:Button ID="AlertButton" runat="server" Text="Alerts"
class="fnctButton" Height="25px" Width="70px" />
<div style="border-style: none; border-color: inherit; border-width: medium; width:210px; height: 103px;">
<p style="text-align: justify; font-size:1.2em; color:White; width: 209px; height: 95px;">
This is a place holder for allerts about cases to which the investigator has been assigned to.
</p>
</div>
</asp:Content>
Current Page containing elements based on second master page based on second master page 当前页面包含基于第二母版页的元素
<%@ Page Title="" Language="C#" MasterPageFile="~/Manager.master" AutoEventWireup="true" CodeBehind="AllocateInvestigators.aspx.cs" Inherits="Prototype5.AllocateInvestigators" %>
<asp:Content ID="AllocateInvestigatorsMain" ContentPlaceHolderID="MainContent" runat="server">
<div>
<table class="style2">
<tr>
<td colspan="4" style="background-color: #C0C0C0">
</td>
</tr>
<tr>
<td class="style1"
style="width: 79px; color: #000000; background-color: #666666;">
<strong>Case ID:</strong></td>
<td align="left" class="style1" style="width: 187px">
<asp:DropDownList ID="caseIDDropDownList" runat="server" Height="22px"
Width="116px" DataSourceID="distinctCaseIDSqlDataSource"
DataTextField="CaseID" DataValueField="CaseID"
onselectedindexchanged="caseIDDropDownList_SelectedIndexChanged">
</asp:DropDownList>
<asp:SqlDataSource ID="distinctCaseIDSqlDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:CMSSQL3ConnectionString1 %>" SelectCommand="SELECT DISTINCT CaseID FROM Exhibits
WHERE InvestigatorID = NULL"></asp:SqlDataSource>
</td>
<td class="style3"
style="width: 119px; color: #000000; background-color: #666666;">
<strong>Case Priority:</strong></td>
<td align="left">
<asp:DropDownList ID="casePriorityDropDownList" runat="server" height="22px"
width="116px">
<asp:ListItem>Low</asp:ListItem>
<asp:ListItem>Medium</asp:ListItem>
<asp:ListItem>High</asp:ListItem>
</asp:DropDownList>
</td>
</tr>
<tr>
<td colspan="4" style="background-color: #C0C0C0">
</td>
</tr>
</table>
</div>
<div>
<table class="style2">
<tr>
<td style="width: 79px; color: #000000;">
<strong>Exhibit ID:</strong></td>
<td align="left">
<asp:DropDownList ID="exhibitsDropDownList" runat="server" height="22px"
onselectedindexchanged="exhibitsDropDownList_SelectedIndexChanged"
width="116px">
</asp:DropDownList>
<asp:SqlDataSource ID="exhibitIDSqlDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:CMSSQL3ConnectionString1 %>"
SelectCommand="SELECT ExhibitID FROM Exhibits"></asp:SqlDataSource>
</td>
</tr>
<tr>
<td colspan="2">
</td>
</tr>
</table>
</div>
<div>
<table class="style2">
<tr>
<td>
<asp:GridView ID="exhibitGridView" runat="server" AutoGenerateColumns="False"
CellPadding="4" DataKeyNames="UserID" DataSourceID="SqlDataSource1"
EmptyDataText="There are no data records to display." ForeColor="#333333"
GridLines="None" Height="241px"
onselectedindexchanged="GridView1_SelectedIndexChanged" Width="323px"
style="margin-right: 0px">
<AlternatingRowStyle BackColor="White" />
<Columns>
<asp:BoundField DataField="UserID" HeaderText="UserID" ReadOnly="True"
SortExpression="UserID" />
<asp:BoundField DataField="UserName" HeaderText="UserName"
SortExpression="UserName" />
<asp:ButtonField ButtonType="Button" CommandName="Select" Text="Assign" />
</Columns>
<FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#FFCC66" ForeColor="#333333" HorizontalAlign="Center" />
<RowStyle BackColor="#FFFBD6" ForeColor="#333333" />
<SelectedRowStyle BackColor="#FFCC66" Font-Bold="True" ForeColor="Navy" />
<SortedAscendingCellStyle BackColor="#FDF5AC" />
<SortedAscendingHeaderStyle BackColor="#4D0000" />
<SortedDescendingCellStyle BackColor="#FCF6C0" />
<SortedDescendingHeaderStyle BackColor="#820000" />
</asp:GridView>
<asp:SqlDataSource ID="assignInvestigatorsSqlDataSource" runat="server"
ConnectionString="<%$ ConnectionStrings:CMSSQL3ConnectionString1 %>"
SelectCommand="SELECT ExhibitID, ExhibitType, ExhibitImage, InvestigatorID FROM Exhibits">
</asp:SqlDataSource>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:CMSSQL3ConnectionString1 %>"
DeleteCommand="DELETE FROM [Exhibits] WHERE [ExhibitID] = @ExhibitID AND [CaseID] = @CaseID"
InsertCommand="INSERT INTO [Exhibits] ([CaseID], [ExhibitType], [DateReceived], [StoredLocation], [OfficerID], [SuspectID], [InvestigatorID], [ManagerID], [AdminID]) VALUES (@CaseID, @ExhibitType, @DateReceived, @StoredLocation, @OfficerID, @SuspectID, @InvestigatorID, @ManagerID, @AdminID)"
ProviderName="<%$ ConnectionStrings:CMSSQL3ConnectionString1.ProviderName %>"
SelectCommand="SELECT UserID, UserName
FROM Users
WHERE UserID IN (SELECT UserID
FROM Users
WHERE UserType LIKE 'Investigator'
AND UserID NOT IN (SELECT InvestigatorID
From Exhibits
GROUP BY (InvestigatorID)
HAVING COUNT(InvestigatorID) > 2));"
UpdateCommand="UPDATE [Exhibits] SET [ExhibitType] = @ExhibitType, [DateReceived] = @DateReceived, [StoredLocation] = @StoredLocation, [OfficerID] = @OfficerID, [SuspectID] = @SuspectID, [InvestigatorID] = @InvestigatorID, [ManagerID] = @ManagerID, [AdminID] = @AdminID WHERE [ExhibitID] = @ExhibitID AND [CaseID] = @CaseID">
<DeleteParameters>
<asp:Parameter Name="ExhibitID" Type="Int32" />
<asp:Parameter Name="CaseID" Type="Int32" />
</DeleteParameters>
<InsertParameters>
<asp:Parameter Name="CaseID" Type="Int32" />
<asp:Parameter Name="ExhibitType" Type="String" />
<asp:Parameter Name="DateReceived" Type="DateTime" />
<asp:Parameter Name="StoredLocation" Type="String" />
<asp:Parameter Name="OfficerID" Type="String" />
<asp:Parameter Name="SuspectID" Type="Int32" />
<asp:Parameter Name="InvestigatorID" Type="String" />
<asp:Parameter Name="ManagerID" Type="String" />
<asp:Parameter Name="AdminID" Type="String" />
</InsertParameters>
<UpdateParameters>
<asp:Parameter Name="ExhibitType" Type="String" />
<asp:Parameter Name="DateReceived" Type="DateTime" />
<asp:Parameter Name="StoredLocation" Type="String" />
<asp:Parameter Name="OfficerID" Type="String" />
<asp:Parameter Name="SuspectID" Type="Int32" />
<asp:Parameter Name="InvestigatorID" Type="String" />
<asp:Parameter Name="ManagerID" Type="String" />
<asp:Parameter Name="AdminID" Type="String" />
<asp:Parameter Name="ExhibitID" Type="Int32" />
<asp:Parameter Name="CaseID" Type="Int32" />
</UpdateParameters>
</asp:SqlDataSource>
</td>
</tr>
</table>
</div>
<div>
<table class="style2">
<tr>
<td>
</td>
<td>
</td>
</tr>
</table>
</div>
</asp:Content>
AND lastly the .cs file of the current page 最后是当前页面的.cs文件
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Data;
namespace Prototype5
{
public partial class AllocateInvestigators : System.Web.UI.Page
{
SqlConnection caseConnection = new SqlConnection();
SqlConnection exhibitConnection = new SqlConnection();
DataSet caseDataSet = new DataSet();
DataSet exhibitDataSet = new DataSet();
SqlDataAdapter caseSqlDataAdapter = new SqlDataAdapter();
SqlDataAdapter exhibitSqlDataAdapter = new SqlDataAdapter();
protected void Page_Load(object sender, EventArgs e)
{
//exhibitGridView.Enabled = false;
}
protected void caseIDDropDownList_SelectedIndexChanged(object sender, EventArgs e)
{
exhibitGridView.Enabled = true;
string selectedCaseID = caseIDDropDownList.SelectedItem.Text.ToString();
CreateExhibitDataset();
DataView exhibitDataView = new DataView(exhibitDataSet.Tables[0]);
exhibitDataView.RowFilter = "CaseID = '" + selectedCaseID + "' ";
exhibitsDropDownList.DataSource = exhibitDataView;
exhibitsDropDownList.DataBind();
}
private void CreateDataSet()
{
caseConnection.ConnectionString =
distinctCaseIDSqlDataSource.ConnectionString;
caseSqlDataAdapter.SelectCommand = new
SqlCommand(distinctCaseIDSqlDataSource.SelectCommand, caseConnection);
caseSqlDataAdapter.Fill(caseDataSet);
}
private void CreateExhibitDataset()
{
exhibitConnection.ConnectionString =
exhibitIDSqlDataSource.ConnectionString;
exhibitSqlDataAdapter.SelectCommand = new
SqlCommand(exhibitIDSqlDataSource.SelectCommand, caseConnection);
exhibitSqlDataAdapter.Fill(exhibitDataSet);
}
}
}
Counting on your kind help...@_@... 依靠您的帮助... @ _ @ ...
1 个解决方案
解决方案1
1 已采纳 2011-01-14 12:13:17
Is this what you are looking for? 这是你想要的？
I have used sample NorthWind DB, so you might have to add DataSources to the GridView. 我已经使用了示例NorthWind DB，因此您可能必须将DataSources添加到GridView。 Here is the markup 这是标记
<asp:GridView ID='GridView1' runat="server" AutoGenerateColumns='False'
DataSourceID='ObjectDataSource1' DataKeyNames='ProductID'
AllowPaging='True'>
<Columns>
<asp:BoundField HeaderText='Name' DataField='ProductName' ReadOnly='true'/>
<asp:TemplateField HeaderText='Order'>
<EditItemTemplate>
<asp:DropDownList ID='DropDownList1' runat='server' DataTextField='ProductName' DataValueField='ProductID'>
<asp:ListItem Enabled='true' Selected='True' Value='2'>
</asp:ListItem>
<asp:ListItem Value='1'></asp:ListItem>
<asp:ListItem Value='3'></asp:ListItem>
</asp:DropDownList>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID='Label1' runat="server" Text='<%# Eval("UnitsOnOrder") %>'></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:CommandField ShowEditButton='true' ButtonType='Link' EditText='Edit' UpdateText='Update' CancelText='Cancel' />
</Columns>
</asp:GridView>
Also you have to set the DropDownList's datasource too. 另外，您还必须设置DropDownList的数据源。 In the above markup I've hard-coded ListItems. 在上面的标记中，我对ListItems进行了硬编码。
Update - Handle OnRowUpdating event on GridView 更新-处理GridView上的OnRowUpdating事件
After update link is clicked the GridView fires OnRowUpdating event... In the event handler you might get the values of the controls (in that row) and act on it, like update your data. 单击更新链接后，GridView将触发OnRowUpdating事件...在事件处理程序中，您可能会获取控件的值（在该行中）并对其执行操作，例如更新数据。 Below is the code snippet... (you have to add OnRowUpdating='HandleOnGridViewRowUpdating' to gridview's markup) 下面是代码片段...（您必须在OnRowUpdating='HandleOnGridViewRowUpdating'的标记中添加OnRowUpdating='HandleOnGridViewRowUpdating' ）
protected void HandleOnGridViewRowUpdating(Object sender, GridViewUpdateEventArgs e)
{
DropDownList dropDownList =
GridView1.Rows[e.RowIndex].FindControl("DropDownList1") as DropDownList;
//got the selected value of dropdown..
//get other required values from the GridView1...
//the DataKeyNames is set to ProductID.. so e.Keys["ProductID"] should give you the //ProductID..
//write a sql that takes these values and updates the db...
}
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