如何使这个DropDownList工作并更新ListView中的数据? [英] How to make this DropDownList works and update data inside the ListView?
本文介绍了如何使这个DropDownList工作并更新ListView中的数据?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
我的数据库中有两个表，如下所示:
**员工表:用户名，名称，工作，部门代码**
**部门表:部门代码，部门名称，部门快捷方式**
我正在使用ListView来显示员工的信息.我没有显示DivisionCode，而是放置了一个DropDownList来显示DivsionShortcut，当然，我将此DropDownList放在了ListView的EditItemTemplate中.除编辑员工信息外，其他所有操作均正常.当我尝试更改员工的部门时，出现以下错误:
***
DropDownList1''的SelectedValue无效，因为它确实存在
在项目列表中不存在.参数名称:值
***
我在ASP.NET中的代码:
I have two tables in my database as following:
**Employee Table: Username, Name, Job, DivisonCode**
**Division Table: DivisionCode, DivisionName, DivisionShortcut**
I am using ListView to show the information of the employee. Instead of showing the DivisionCode, I put a DropDownList that for showing the DivsionShortcut and of course I put this DropDownList inside the EditItemTemplate in the ListView. Everything works fine except editing the employee information. When I tried to change the division of the employee, I got the following error:
***
DropDownList1'' has a SelectedValue which is invalid because it does
not exist in the list of items. Parameter name: value
***
My Code in ASP.NET:
<asp:ListView ID="ListView1" runat="server" DataKeyNames="Username"
DataSourceID="SqlDataSource1" >
<EditItemTemplate>
<tr style="">
<td>
<asp:Button ID="UpdateButton" runat="server" CommandName="Update"
Text="Update" />
<asp:Button ID="CancelButton" runat="server" CommandName="Cancel"
Text="Cancel" />
</td>
<td>
<asp:TextBox ID="NameTextBox" runat="server" Text=''<%# Bind("Name") %>'' />
</td>
<td>
<asp:Label ID="UsernameLabel1" runat="server" Text=''<%# Eval("Username") %>'' />
</td>
<td>
<asp:TextBox ID="JobTitleTextBox" runat="server"
Text=''<%# Bind("JobTitle") %>'' />
</td>
<td>
<asp:TextBox ID="BadgeNoTextBox" runat="server" Text=''<%# Bind("BadgeNo") %>'' />
</td>
<td>
<asp:DropDownList ID="DropDownList1" runat="server"
DataSourceID="SqlDataSource1" DataTextField="DivisionShortcut" selectedValue=''<%# Bind("DivisionShortcut") %>''
DataValueField="SapCode">
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:testConnectionString %>"
InsertCommand="INSERT INTO [Divisions] ([SapCode], [DivisionShortcut]) VALUES (@SapCode, @DivisionShortcut)"
SelectCommand="SELECT * FROM [Divisions]"
UpdateCommand="UPDATE [Divisions] SET [DivisionShortcut] = @DivisionShortcut WHERE [SapCode] = @SapCode">
<DeleteParameters>
<asp:Parameter Name="SapCode" Type="Double" />
</DeleteParameters>
<InsertParameters>
<asp:Parameter Name="SapCode" Type="Double" />
<asp:Parameter Name="DivisionShortcut" Type="String" />
</InsertParameters>
<UpdateParameters>
<asp:Parameter Name="DivisionShortcut" Type="String" />
<asp:Parameter Name="SapCode" Type="Double" />
</UpdateParameters>
</asp:SqlDataSource>
</td>
</tr>
</EditItemTemplate>
<EmptyDataTemplate>
<table runat="server" style="">
<tr>
<td>
No data was returned.</td>
</tr>
</table>
</EmptyDataTemplate>
<InsertItemTemplate>
<tr style="">
<td>
<asp:Button ID="InsertButton" runat="server" CommandName="Insert"
Text="Insert" />
<asp:Button ID="CancelButton" runat="server" CommandName="Cancel"
Text="Clear" />
</td>
<td>
<asp:TextBox ID="NameTextBox" runat="server" Text=''<%# Bind("Name") %>'' />
</td>
<td>
<asp:TextBox ID="UsernameTextBox" runat="server"
Text=''<%# Bind("Username") %>'' />
</td>
<td>
<asp:TextBox ID="JobTitleTextBox" runat="server"
Text=''<%# Bind("JobTitle") %>'' />
</td>
<td>
<asp:TextBox ID="BadgeNoTextBox" runat="server" Text=''<%# Bind("BadgeNo") %>'' />
</td>
<td>
<asp:TextBox ID="DivisionShortcutTextBox" runat="server"
Text=''<%# Bind("DivisionShortcut") %>'' />
</td>
</tr>
</InsertItemTemplate>
<ItemTemplate>
<tr style="">
<td>
<asp:ImageButton ID="DeleteButton" ImageUrl="images/delete.png" Width="20px" runat="server" CommandName="Delete" />
<asp:ImageButton ID="EditButton" ImageUrl="images/edit.png" Width="20px" runat="server" CommandName="Edit" />
</td>
<td>
<asp:Label ID="NameLabel" runat="server" Text=''<%# Eval("Name") %>'' />
</td>
<td>
<asp:Label ID="UsernameLabel" runat="server" Text=''<%# Eval("Username") %>'' />
</td>
<td>
<asp:Label ID="JobTitleLabel" runat="server" Text=''<%# Eval("JobTitle") %>'' />
</td>
<td>
<asp:Label ID="BadgeNoLabel" runat="server" Text=''<%# Eval("BadgeNo") %>'' />
</td>
<td>
<asp:Label ID="DivisionShortcutLabel" runat="server"
Text=''<%# Eval("DivisionShortcut") %>'' />
</td>
</tr>
</ItemTemplate>
<LayoutTemplate>
<table ID="itemPlaceholderContainer" runat="server" border="0" style="">
<tr runat="server" style="">
<th runat="server">
Name</th>
<th runat="server">
Username</th>
<th runat="server">
JobTitle</th>
<th runat="server">
BadgeNo</th>
<th runat="server">
Division</th>
</tr>
<tr ID="itemPlaceholder" runat="server">
</tr>
</table>
<tr runat="server">
<td runat="server" style="">
<asp:DataPager ID="DataPager1" runat="server">
<Fields>
<asp:NextPreviousPagerField ButtonType="Button" ShowFirstPageButton="True"
ShowLastPageButton="True" />
</Fields>
</asp:DataPager>
</td>
</tr>
</table>
</LayoutTemplate>
<SelectedItemTemplate>
<tr style="">
<td>
<asp:ImageButton ID="DeleteButton" ImageUrl="images/delete.png" Width="20px" runat="server" CommandName="Delete" />
<%--<asp:Button ID="DeleteButton" runat="server" CommandName="Delete"
Text="Delete" />--%>
<asp:ImageButton ID="EditButton" ImageUrl="images/edit.png" Width="20px" runat="server" CommandName="Edit" />
<%--<asp:Button ID="EditButton" runat="server" CommandName="Edit" Text="Edit" />--%>
</td>
<td>
<asp:Label ID="NameLabel" runat="server" Text=''<%# Eval("Name") %>'' />
</td>
<td>
<asp:Label ID="UsernameLabel" runat="server" Text=''<%# Eval("Username") %>'' />
</td>
<td>
<asp:Label ID="JobTitleLabel" runat="server" Text=''<%# Eval("JobTitle") %>'' />
</td>
<td>
<asp:Label ID="BadgeNoLabel" runat="server" Text=''<%# Eval("BadgeNo") %>'' />
</td>
<td>
<asp:Label ID="DivisionShortcutLabel" runat="server"
Text=''<%# Eval("DivisionShortcut") %>'' />
</td>
</tr>
</SelectedItemTemplate>
</asp:ListView>
<br />
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:testConnectionString %>"
SelectCommand="SELECT dbo.employee.Name, dbo.employee.Username, dbo.employee.JobTitle, dbo.employee.BadgeNo, dbo.Divisions.DivisionShortcut
FROM dbo.Divisions INNER JOIN
dbo.employee ON dbo.Divisions.SapCode = dbo.employee.DivisionCode"
DeleteCommand="DELETE FROM [Employee] WHERE [Username] = @Username"
UpdateCommand="UPDATE [Divisions] SET [DivisionShortcut] = @DivisionShortcut WHERE [DivisionCode] = @DivisionCode"
FilterExpression="[DivisionShortcut] like ''{0}%''">
<DeleteParameters>
<asp:Parameter Name="Username" Type="String" />
</DeleteParameters>
<UpdateParameters>
<asp:Parameter Name="DivisionShortcut" Type="String" />
</UpdateParameters>
<FilterParameters>
<asp:ControlParameter ControlID="ddlDivision" Name="DivisionName"
PropertyName="SelectedValue" Type="String" />
</FilterParameters>
</asp:SqlDataSource>
那么如何解决此问题?
推荐答案
ConnectionStrings:testConnectionString％> InsertCommand ="INSERT INTO [Divisions]([SapCode]，[DivisionShortcut])VALUES(@SapCode，@DivisionShortcut)" SelectCommand ="SELECT * FROM [部门]" UpdateCommand ="UPDATE [Divisions] SET [DivisionShortcut] = @DivisionShortcut WHERE [SapCode] = @SapCode"> < DeleteParameters> < asp:参数名称="SapCode"类型="Double"/> </DeleteParameters> < InsertParameters> < asp:参数名称="SapCode"类型="Double"/> < asp:参数名称="DivisionShortcut"类型="String"/> </InsertParameters> < UpdateParameters> < asp:参数名称="DivisionShortcut"类型="String"/> < asp:参数名称="SapCode"类型="Double"/> </UpdateParameters> </asp:SqlDataSource> </td> </tr> </EditItemTemplate> < EmptyDataTemplate> < table runat ="server" style ="> < tr> < td> 没有数据返回. </tr> </table> </EmptyDataTemplate> < InsertItemTemplate> < tr style ="> < td> < asp:Button ID ="InsertButton" runat ="server" CommandName ="Insert" Text =插入"/> < asp:Button ID ="CancelButton" runat ="server" CommandName ="Cancel" 文字=清除"/> </td> < td> < asp:TextBox ID ="NameTextBox" runat ="server" Text =''<％#Bind("Name")％>''/> </td> < td> < asp:TextBox ID ="UsernameTextBox" runat ="server" Text =''<％#Bind("Username")％>''/> </td> < td> < asp:TextBox ID ="JobTitleTextBox" runat =服务器" Text =''<％#Bind("JobTitle")％>''/> </td> < td> < asp:TextBox ID ="BadgeNoTextBox" runat =服务器" Text =''<％#Bind(" BadgeNo)％>''/> </td> < td> < asp:TextBox ID ="DivisionShortcutTextBox" runat =服务器" Text =''<％#Bind("DivisionShortcut")％>''/> </td> </tr> </InsertItemTemplate> < ItemTemplate> < tr style ="> < td> < asp:ImageButton ID ="DeleteButton" ImageUrl ="images/delete.png" Width ="20px" runat ="server" CommandName ="Delete"/> < asp:ImageButton ID ="EditButton" ImageUrl ="images/edit.png" Width ="20px" runat ="server" CommandName ="Edit"/> </td> < td> < asp:Label ID ="NameLabel" runat ="server" Text =''<％#Eval("Name")％>''/> </td> < td> < asp:Label ID ="UsernameLabel" runat ="server" Text =''<％#Eval("Username")％>''/> </td> < td> < asp:Label ID ="JobTitleLabel" runat ="server" Text =''<％#Eval("JobTitle")％>''/> </td> < td> < asp:Label ID ="BadgeNoLabel" runat ="server" Text =''<％#Eval("BadgeNo")％>''/> </td> < td> < asp:标签ID ="DivisionShortcutLabel" runat =服务器" Text =''<％#Eval("DivisionShortcut")％>''/> </td> </tr> </ItemTemplate> < LayoutTemplate> <表ID ="itemPlaceholderContainer" runat =服务器" border ="0" style ="> < tr runat ="server" style ="> < th runat ="server"> 名称</th> < th runat ="server"> 用户名</th> < th runat ="server"> JobTitle</th> < th runat ="server"> BadgeNo&th; < th runat ="server"> 部门 </tr> < tr ID ="itemPlaceholder" runat ="server"> </tr> </table> < tr runat ="server"> < td runat ="server" style ="> < asp:DataPager ID ="DataPager1" runat ="server"> <字段> < asp:NextPreviousPagerField ButtonType ="Button" ShowFirstPageButton ="True" ShowLastPageButton ="True"/> </字段> </asp:DataPager> </td> </tr> </table> </LayoutTemplate> < SelectedItemTemplate> < tr style ="> < td> < asp:ImageButton ID ="DeleteButton" ImageUrl ="images/delete.png" Width ="20px" runat ="server" CommandName ="Delete"/> <％-< asp:按钮ID ="DeleteButton" runat =服务器" CommandName =删除" Text =删除"/>-％> < asp:ImageButton ID ="EditButton" ImageUrl ="images/edit.png" Width ="20px" runat ="server" CommandName ="Edit"/> <％-< asp:Button ID ="EditButton" runat ="server" CommandName ="Edit" Text ="Edit"/>-％> </td> < td> < asp:Label ID ="NameLabel" runat ="server" Text =''<％#Eval("Name")％>''/> </td> < td> < asp:Label ID ="UsernameLabel" runat ="server" Text =''<％#Eval("Username")％>''/> </td> < td> < asp:Label ID ="JobTitleLabel" runat ="server" Text =''<％#Eval("JobTitle")％>''/> </td> < td> < asp:Label ID ="BadgeNoLabel" runat ="server" Text =''<％#Eval("BadgeNo")％>''/> </td> < td> < asp:标签ID ="DivisionShortcutLabel" runat =服务器" Text =''<％#Eval("DivisionShortcut")％>''/> </td> </tr> </SelectedItemTemplate> </asp:ListView> < br/> < asp:SqlDataSource ID ="SqlDataSource1" runat =服务器" ConnectionString =<％
ConnectionStrings:testConnectionString %>" InsertCommand="INSERT INTO [Divisions] ([SapCode], [DivisionShortcut]) VALUES (@SapCode, @DivisionShortcut)" SelectCommand="SELECT * FROM [Divisions]" UpdateCommand="UPDATE [Divisions] SET [DivisionShortcut] = @DivisionShortcut WHERE [SapCode] = @SapCode"> <DeleteParameters> <asp:Parameter Name="SapCode" Type="Double" /> </DeleteParameters> <InsertParameters> <asp:Parameter Name="SapCode" Type="Double" /> <asp:Parameter Name="DivisionShortcut" Type="String" /> </InsertParameters> <UpdateParameters> <asp:Parameter Name="DivisionShortcut" Type="String" /> <asp:Parameter Name="SapCode" Type="Double" /> </UpdateParameters> </asp:SqlDataSource> </td> </tr> </EditItemTemplate> <EmptyDataTemplate> <table runat="server" style=""> <tr> <td> No data was returned.</td> </tr> </table> </EmptyDataTemplate> <InsertItemTemplate> <tr style=""> <td> <asp:Button ID="InsertButton" runat="server" CommandName="Insert" Text="Insert" /> <asp:Button ID="CancelButton" runat="server" CommandName="Cancel" Text="Clear" /> </td> <td> <asp:TextBox ID="NameTextBox" runat="server" Text=''<%# Bind("Name") %>'' /> </td> <td> <asp:TextBox ID="UsernameTextBox" runat="server" Text=''<%# Bind("Username") %>'' /> </td> <td> <asp:TextBox ID="JobTitleTextBox" runat="server" Text=''<%# Bind("JobTitle") %>'' /> </td> <td> <asp:TextBox ID="BadgeNoTextBox" runat="server" Text=''<%# Bind("BadgeNo") %>'' /> </td> <td> <asp:TextBox ID="DivisionShortcutTextBox" runat="server" Text=''<%# Bind("DivisionShortcut") %>'' /> </td> </tr> </InsertItemTemplate> <ItemTemplate> <tr style=""> <td> <asp:ImageButton ID="DeleteButton" ImageUrl="images/delete.png" Width="20px" runat="server" CommandName="Delete" /> <asp:ImageButton ID="EditButton" ImageUrl="images/edit.png" Width="20px" runat="server" CommandName="Edit" /> </td> <td> <asp:Label ID="NameLabel" runat="server" Text=''<%# Eval("Name") %>'' /> </td> <td> <asp:Label ID="UsernameLabel" runat="server" Text=''<%# Eval("Username") %>'' /> </td> <td> <asp:Label ID="JobTitleLabel" runat="server" Text=''<%# Eval("JobTitle") %>'' /> </td> <td> <asp:Label ID="BadgeNoLabel" runat="server" Text=''<%# Eval("BadgeNo") %>'' /> </td> <td> <asp:Label ID="DivisionShortcutLabel" runat="server" Text=''<%# Eval("DivisionShortcut") %>'' /> </td> </tr> </ItemTemplate> <LayoutTemplate> <table ID="itemPlaceholderContainer" runat="server" border="0" style=""> <tr runat="server" style=""> <th runat="server"> Name</th> <th runat="server"> Username</th> <th runat="server"> JobTitle</th> <th runat="server"> BadgeNo</th> <th runat="server"> Division</th> </tr> <tr ID="itemPlaceholder" runat="server"> </tr> </table> <tr runat="server"> <td runat="server" style=""> <asp:DataPager ID="DataPager1" runat="server"> <Fields> <asp:NextPreviousPagerField ButtonType="Button" ShowFirstPageButton="True" ShowLastPageButton="True" /> </Fields> </asp:DataPager> </td> </tr> </table> </LayoutTemplate> <SelectedItemTemplate> <tr style=""> <td> <asp:ImageButton ID="DeleteButton" ImageUrl="images/delete.png" Width="20px" runat="server" CommandName="Delete" /> <%--<asp:Button ID="DeleteButton" runat="server" CommandName="Delete" Text="Delete" />--%> <asp:ImageButton ID="EditButton" ImageUrl="images/edit.png" Width="20px" runat="server" CommandName="Edit" /> <%--<asp:Button ID="EditButton" runat="server" CommandName="Edit" Text="Edit" />--%> </td> <td> <asp:Label ID="NameLabel" runat="server" Text=''<%# Eval("Name") %>'' /> </td> <td> <asp:Label ID="UsernameLabel" runat="server" Text=''<%# Eval("Username") %>'' /> </td> <td> <asp:Label ID="JobTitleLabel" runat="server" Text=''<%# Eval("JobTitle") %>'' /> </td> <td> <asp:Label ID="BadgeNoLabel" runat="server" Text=''<%# Eval("BadgeNo") %>'' /> </td> <td> <asp:Label ID="DivisionShortcutLabel" runat="server" Text=''<%# Eval("DivisionShortcut") %>'' /> </td> </tr> </SelectedItemTemplate> </asp:ListView> <br /> <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%
ConnectionStrings:testConnectionString％>" SelectCommand ="SELECT dbo.employee.Name，dbo.employee.Username，dbo.employee.JobTitle，dbo.employee.BadgeNo，dbo.Divisions.DivisionShortcut 来自dbo.Divisions内部联接 dbo.employee ON dbo.Divisions.SapCode = dbo.employee.DivisionCode DeleteCommand ="DELETE FROM [Employee] WHERE [Username] = @Username" UpdateCommand ="UPDATE [Divisions] SET [DivisionShortcut] = @DivisionShortcut WHERE [DivisionCode] = @DivisionCode" FilterExpression ="[DivisionShortcut]之类的"{0}％""> < DeleteParameters> < asp:参数名称=用户名"类型=字符串"/> </DeleteParameters> < UpdateParameters> < asp:参数名称="DivisionShortcut"类型="String"/> </UpdateParameters> < FilterParameters> < asp:ControlParameter ControlID ="ddlDivision" Name ="DivisionName" PropertyName ="SelectedValue" Type ="String"/> </FilterParameters> </asp:SqlDataSource>
ConnectionStrings:testConnectionString %>" SelectCommand="SELECT dbo.employee.Name, dbo.employee.Username, dbo.employee.JobTitle, dbo.employee.BadgeNo, dbo.Divisions.DivisionShortcut FROM dbo.Divisions INNER JOIN dbo.employee ON dbo.Divisions.SapCode = dbo.employee.DivisionCode" DeleteCommand="DELETE FROM [Employee] WHERE [Username] = @Username" UpdateCommand="UPDATE [Divisions] SET [DivisionShortcut] = @DivisionShortcut WHERE [DivisionCode] = @DivisionCode" FilterExpression="[DivisionShortcut] like ''{0}%''"> <DeleteParameters> <asp:Parameter Name="Username" Type="String" /> </DeleteParameters> <UpdateParameters> <asp:Parameter Name="DivisionShortcut" Type="String" /> </UpdateParameters> <FilterParameters> <asp:ControlParameter ControlID="ddlDivision" Name="DivisionName" PropertyName="SelectedValue" Type="String" /> </FilterParameters> </asp:SqlDataSource>
那么如何解决此问题?
这篇关于如何使这个DropDownList工作并更新ListView中的数据?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IT屋！
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