我的数据库中有以下表格:
建议日志表: ID,标题,说明。
员工表:用户名,姓名
分区表: DivisionCode,DivisionName
我想显示仅包含SuggestionID,SuggestionTitle,EmployeeName和DivisionName的表格,当用户点击SuggestionTitle时,会显示一个弹出窗口,其中包含建议说明。
由于我是ASP.NET初学者开发人员,我尝试按this tutorial来获取它,但我失败了。
我所做的是以下内容:
ASP.NET代码:
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
AllowSorting="True" AutoGenerateColumns="False" DataKeyNames="ID"
DataSourceID="SqlDataSource1" OnRowDataBound="GridView1_RowDataBound">
<Columns>
<asp:BoundField DataField="ID" HeaderText="ID" InsertVisible="False"
ReadOnly="True" SortExpression="ID" />
<asp:TemplateField HeaderText="Title">
<ItemTemplate>
<asp:LinkButton runat="server" ID="lnkSuggestionTitle"
Text='<%#Eval("Title") %>'
OnClick="lnkSuggestionTitle_Click">
</asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<%--<asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />--%>
<asp:BoundField DataField="Description" HeaderText="Description"
SortExpression="Description" />
<asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />
<asp:BoundField DataField="Username" HeaderText="Username"
SortExpression="Username" />
<asp:BoundField DataField="DivisionName" HeaderText="Division"
SortExpression="DivisionName" />
</Columns>
</asp:GridView>
<asp:Button runat="server" ID="btnModalPopUp" style="display:none" />
<AjaxToolkit:ModalPopupExtender ID="modalPopUpExtender1"
runat="server" TargetControlID="btnModalPopUp" PopupControlID="pnlPopUp" BackgroundCssClass="modalBackground"
OkControlID="btnOk" X="20" Y="100">
</AjaxToolkit:ModalPopupExtender>
<asp:Panel runat="server" ID="pnlPopUp" CssClass="confirm-dialog">
<asp:GridView ID="GridView2" runat="server">
</asp:GridView>
</asp:Panel>
</ContentTemplate>
</asp:UpdatePanel>
<br />
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:testConnectionString %>"
SelectCommand="SELECT dbo.SafetySuggestionsLog.ID, dbo.SafetySuggestionsLog.Title, dbo.SafetySuggestionsLog.Description, dbo.employee.Name, dbo.SafetySuggestionsLog.Username,
dbo.Divisions.DivisionName
FROM dbo.employee INNER JOIN
dbo.SafetySuggestionsLog ON dbo.employee.Username = dbo.SafetySuggestionsLog.Username INNER JOIN
dbo.Divisions ON dbo.employee.DivisionCode = dbo.Divisions.SapCode">
</asp:SqlDataSource>
代码隐藏:
protected void lnkSuggestionTitle_Click(object sender, EventArgs e)
{
LinkButton lnkSuggestionTitle = sender as LinkButton;
string strSuggestionTitle = lnkSuggestionTitle.Text;
string strConnectionString = ConfigurationManager.ConnectionStrings["testConnectionString"].ConnectionString;
string strSelect = "SELECT ID, Title, Description FROM dbo.SafetySuggestionsLog";
SqlConnection sqlCon = new SqlConnection();
sqlCon.ConnectionString = strConnectionString;
SqlCommand cmdSuggestionDetails = new SqlCommand();
cmdSuggestionDetails.Connection = sqlCon;
cmdSuggestionDetails.CommandType = System.Data.CommandType.Text;
cmdSuggestionDetails.CommandText = strSelect;
cmdSuggestionDetails.Parameters.AddWithValue("@Title", strSuggestionTitle);
sqlCon.Open();
SqlDataReader dReader = cmdSuggestionDetails.ExecuteReader();
GridView1.DataSource = dReader;
GridView1.DataBind();
sqlCon.Close();
modalPopUpExtender1.Show();
}
一切进展顺利,但在网站上,当我点击其中一个标题时,我没有得到ModalPopUp。另外,我在Internet Explorer浏览器的左下角收到错误通知,当我打开它时,它给了我以下描述:
**
Sys.ArgumentNullException:值不能为null。参数名称: 元素
**
我不知道为什么会这样。有什么帮助吗?
答案 0 :(得分:3)
此问题通常是错误的OkControlID或CancelControlID(通过here),在这种情况下可能是“btnOk”。
答案 1 :(得分:0)
根据@ PeterX的建议,是的,你的小组声明遗漏了很多东西。
我会像这样重做这个,这是我在另一个更大的GridView
控件中使用的。
<ajaxToolkit:ModalPopupExtender ID="mpeEndorsed" runat="server"
BackgroundCssClass="modalBackground"
PopupControlID="pnlEndorsed"
OkControlID="btnEndorsed"
CancelControlID="btnNotEndorsed"
PopupDragHandleControlID="dvHdr"
Drag="true"
TargetControlID="cbEndorsed">
</ajaxToolkit:ModalPopupExtender>
<asp:Panel ID="pnlEndorsed" runat="server" CssClass="pnlEndorsed" style="display:none">
<div id="dvHdr">
<asp:Label ID="Label3" runat="server">** CONTACT LOG **</asp:Label>
</div>
<div id="dvBody">
<table style="text-align:center; width:100%">
<tr>
<asp:GridView ID="gvContactLog" runat="server" ForeColor="#333333" GridLines="None" AllowPaging="true" PageSize="8" Font-Size="X-Small" CellPadding="4" AllowSorting="True" AutoGenerateColumns="False">
</asp:GridView>
</tr>
<tr>
<td>
<asp:Button ID="btnEndorsed" runat="server" Text="YES" />
<asp:Button ID="btnNotEndorsed" runat="server" Text="NO" />
</td>
</tr>
</table>
</div>
</asp:Panel>
注意弹出式面板中的GridView 是一个骨架,必须通过JavaScript或CodeBehind构建才能使其有用。
在弹出式面板中定义GridView的完整(包含DataSource,字段等),这是在另一个更大的Gridview中(如我的情况),不起作用!你会看到一个混乱的屏幕和各种各样的东西。我想这是AjaxToolKit的一个限制,混合客户端和服务器端功能。