C＃：没有为一个或多个必需的参数给出的FormView

我使用一个FormView，当我想更新的东西我已经编辑，我总是得到这个错误值：C＃：没有为一个或多个必需的参数给出的FormView

No value given for one or more required parameters.

我使用一个SqlDataSource与FormView结合使用。

这是我的formview的代码。

<asp:SqlDataSource ID="sqldsLokaalPrinters" runat="server" 
     ConnectionString="<%$ ConnectionStrings:connRand2 %>" 
     DeleteCommand="DELETE FROM [tblComputers] WHERE (([tblArtveldenr] = ?) OR ([tblArtveldenr] IS NULL AND ? IS NULL))" 
     InsertCommand="INSERT INTO [tblComputers] ([tblArtveldenr], [tblNaam], [tblCLokaal_id], [tblPositie], [tblSerienr], [tblTCPIP], [tblFabrikant], [tblModel], [tblProcessor], [tblSnelheid], [tblKleur], [tblGeheugen], [tblHarddisk], [tblZip], [tblCD], [tblDVD], [tblNetwerk], [tblFirewire], [tblAanschafdatum], [tblCLeverabcierNr], [tblScherm], [tblLaptop]) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)" 
     ProviderName="<%$ ConnectionStrings:connRand2.ProviderName %>" 
     SelectCommand="SELECT * FROM [tblComputers] WHERE ([tblCLokaal_id] = ?)" 
     UpdateCommand="UPDATE [tblComputers] SET [tblNaam] = ?, [tblCLokaal_id] = ?, [tblPositie] = ?, [tblSerienr] = ?, [tblTCPIP] = ?, [tblFabrikant] = ?, [tblModel] = ?, [tblProcessor] = ?, [tblSnelheid] = ?, [tblKleur] = ?, [tblGeheugen] = ?, [tblHarddisk] = ?, [tblZip] = ?, [tblCD] = ?, [tblDVD] = ?, [tblNetwerk] = ?, [tblFirewire] = ?, [tblAanschafdatum] = ?, [tblCLeverabcierNr] = ?, [tblScherm] = ?, [tblLaptop] = ? WHERE (([tblArtveldenr] = ?) OR ([tblArtveldenr] IS NULL AND ? IS NULL))"> 
     <SelectParameters> 
      <asp:SessionParameter Name="tblCLokaal_id" SessionField="lokaalID" 
       Type="Int16" /> 
     </SelectParameters> 
     <DeleteParameters> 
      <asp:Parameter Name="tblArtveldenr" Type="String" /> 
     </DeleteParameters> 
     <UpdateParameters> 
      <asp:Parameter Name="tblNaam" Type="String" /> 
      <asp:Parameter Name="tblCLokaal_id" Type="Int16" /> 
      <asp:Parameter Name="tblPositie" Type="Int32" /> 
      <asp:Parameter Name="tblSerienr" Type="String" /> 
      <asp:Parameter Name="tblTCPIP" Type="String" /> 
      <asp:Parameter Name="tblFabrikant" Type="String" /> 
      <asp:Parameter Name="tblModel" Type="String" /> 
      <asp:Parameter Name="tblProcessor" Type="String" /> 
      <asp:Parameter Name="tblSnelheid" Type="Int32" /> 
      <asp:Parameter Name="tblKleur" Type="String" /> 
      <asp:Parameter Name="tblGeheugen" Type="Int32" /> 
      <asp:Parameter Name="tblHarddisk" Type="Double" /> 
      <asp:Parameter Name="tblZip" Type="String" /> 
      <asp:Parameter Name="tblCD" Type="String" /> 
      <asp:Parameter Name="tblDVD" Type="String" /> 
      <asp:Parameter Name="tblNetwerk" Type="String" /> 
      <asp:Parameter Name="tblFirewire" Type="Int32" /> 
      <asp:Parameter Name="tblAanschafdatum" Type="DateTime" /> 
      <asp:Parameter Name="tblCLeverabcierNr" Type="Int32" /> 
      <asp:Parameter Name="tblScherm" Type="String" /> 
      <asp:Parameter Name="tblLaptop" Type="Boolean" /> 
      <asp:Parameter Name="tblArtveldenr" Type="String" /> 
     </UpdateParameters> 
     <InsertParameters> 
      <asp:Parameter Name="tblArtveldenr" Type="String" /> 
      <asp:Parameter Name="tblNaam" Type="String" /> 
      <asp:Parameter Name="tblCLokaal_id" Type="Int16" /> 
      <asp:Parameter Name="tblPositie" Type="Int32" /> 
      <asp:Parameter Name="tblSerienr" Type="String" /> 
      <asp:Parameter Name="tblTCPIP" Type="String" /> 
      <asp:Parameter Name="tblFabrikant" Type="String" /> 
      <asp:Parameter Name="tblModel" Type="String" /> 
      <asp:Parameter Name="tblProcessor" Type="String" /> 
      <asp:Parameter Name="tblSnelheid" Type="Int32" /> 
      <asp:Parameter Name="tblKleur" Type="String" /> 
      <asp:Parameter Name="tblGeheugen" Type="Int32" /> 
      <asp:Parameter Name="tblHarddisk" Type="Double" /> 
      <asp:Parameter Name="tblZip" Type="String" /> 
      <asp:Parameter Name="tblCD" Type="String" /> 
      <asp:Parameter Name="tblDVD" Type="String" /> 
      <asp:Parameter Name="tblNetwerk" Type="String" /> 
      <asp:Parameter Name="tblFirewire" Type="Int32" /> 
      <asp:Parameter Name="tblAanschafdatum" Type="DateTime" /> 
      <asp:Parameter Name="tblCLeverabcierNr" Type="Int32" /> 
      <asp:Parameter Name="tblScherm" Type="String" /> 
      <asp:Parameter Name="tblLaptop" Type="Boolean" /> 
     </InsertParameters> 
    </asp:SqlDataSource>

这是我的SqlDataSource

<asp:FormView ID="FormView1" runat="server" AllowPaging="True" 
     DataKeyNames="tblArtveldenr" DataSourceID="sqldsLokaalPrinters"> 
     <EditItemTemplate> 
      tblPositie: 
      <asp:TextBox ID="tblPositieTextBox" runat="server" 
       Text='<%# Bind("tblPositie") %>' /> 
      <br /> 
      tblSerienr: 
      <asp:TextBox ID="tblSerienrTextBox" runat="server" 
       Text='<%# Bind("tblSerienr") %>' /> 
      <br /> 
      tblFabrikant: 
      <asp:TextBox ID="tblFabrikantTextBox" runat="server" 
       Text='<%# Bind("tblFabrikant") %>' /> 
      <br /> 
      tblModel: 
      <asp:TextBox ID="tblModelTextBox" runat="server" 
       Text='<%# Bind("tblModel") %>' /> 
      <br /> 
      tblSnelheid: 
      <asp:TextBox ID="tblSnelheidTextBox" runat="server" 
       Text='<%# Bind("tblSnelheid") %>' /> 
      <br /> 
      tblHarddisk: 
      <asp:TextBox ID="tblHarddiskTextBox" runat="server" 
       Text='<%# Bind("tblHarddisk") %>' /> 
      <br /> 
      tblCD: 
      <asp:TextBox ID="tblCDTextBox" runat="server" Text='<%# Bind("tblCD") %>' /> 
      <br /> 
      tblDVD: 
      <asp:TextBox ID="tblDVDTextBox" runat="server" Text='<%# Bind("tblDVD") %>' /> 
      <br /> 
      tblAanschafdatum: 
      <asp:TextBox ID="tblAanschafdatumTextBox" runat="server" 
       Text='<%# Bind("tblAanschafdatum") %>' /> 
      <br /> 
      <asp:LinkButton ID="UpdateButton" runat="server" CausesValidation="True" 
       CommandName="Update" Text="Update" /> 
      &nbsp;<asp:LinkButton ID="UpdateCancelButton" runat="server" 
       CausesValidation="False" CommandName="Cancel" Text="Cancel" /> 
     </EditItemTemplate> 
     <InsertItemTemplate> 
      tblPositie: 
      <asp:TextBox ID="tblPositieTextBox" runat="server" 
       Text='<%# Bind("tblPositie") %>' /> 
      <br /> 
      tblSerienr: 
      <asp:TextBox ID="tblSerienrTextBox" runat="server" 
       Text='<%# Bind("tblSerienr") %>' /> 
      <br /> 
      tblFabrikant: 
      <asp:TextBox ID="tblFabrikantTextBox" runat="server" 
       Text='<%# Bind("tblFabrikant") %>' /> 
      <br /> 
      tblModel: 
      <asp:TextBox ID="tblModelTextBox" runat="server" 
       Text='<%# Bind("tblModel") %>' /> 
      <br /> 
      tblSnelheid: 
      <asp:TextBox ID="tblSnelheidTextBox" runat="server" 
       Text='<%# Bind("tblSnelheid") %>' /> 
      <br /> 
      tblHarddisk: 
      <asp:TextBox ID="tblHarddiskTextBox" runat="server" 
       Text='<%# Bind("tblHarddisk") %>' /> 
      <br /> 
      tblCD: 
      <asp:TextBox ID="tblCDTextBox" runat="server" Text='<%# Bind("tblCD") %>' /> 
      <br /> 
      tblDVD: 
      <asp:TextBox ID="tblDVDTextBox" runat="server" Text='<%# Bind("tblDVD") %>' /> 
      <br /> 
      tblAanschafdatum: 
      <asp:TextBox ID="tblAanschafdatumTextBox" runat="server" 
       Text='<%# Bind("tblAanschafdatum") %>' /> 
      <br /> 
      <asp:LinkButton ID="InsertButton" runat="server" CausesValidation="True" 
       CommandName="Insert" Text="Insert" /> 
&nbsp;<asp:LinkButton ID="InsertCancelButton" runat="server" CausesValidation="False" 
       CommandName="Cancel" Text="Cancel" /> 
     </InsertItemTemplate> 
     <ItemTemplate> 
      tblPositie: 
      <asp:Label ID="tblPositieLabel" runat="server" 
       Text='<%# Bind("tblPositie") %>' /> 
      <br /> 
      tblSerienr: 
      <asp:Label ID="tblSerienrLabel" runat="server" 
       Text='<%# Bind("tblSerienr") %>' /> 
      <br /> 
      tblFabrikant: 
      <asp:Label ID="tblFabrikantLabel" runat="server" 
       Text='<%# Bind("tblFabrikant") %>' /> 
      <br /> 
      tblModel: 
      <asp:Label ID="tblModelLabel" runat="server" Text='<%# Bind("tblModel") %>' /> 
      <br /> 
      tblSnelheid: 
      <asp:Label ID="tblSnelheidLabel" runat="server" 
       Text='<%# Bind("tblSnelheid") %>' /> 
      <br /> 
      tblHarddisk: 
      <asp:Label ID="tblHarddiskLabel" runat="server" 
       Text='<%# Bind("tblHarddisk") %>' /> 
      <br /> 
      tblCD: 
      <asp:Label ID="tblCDLabel" runat="server" Text='<%# Bind("tblCD") %>' /> 
      <br /> 
      tblDVD: 
      <asp:Label ID="tblDVDLabel" runat="server" Text='<%# Bind("tblDVD") %>' /> 
      <br /> 
      tblAanschafdatum: 
      <asp:Label ID="tblAanschafdatumLabel" runat="server" 
       Text='<%# Bind("tblAanschafdatum") %>' /> 
      <br /> 
      <br /> 
      <asp:LinkButton ID="EditButton" runat="server" CausesValidation="False" 
       CommandName="Edit" Text="Edit" /> 
      &nbsp;<asp:LinkButton ID="DeleteButton" runat="server" CausesValidation="False" 
       CommandName="Delete" Text="Delete" /> 
      &nbsp;<asp:LinkButton ID="NewButton" runat="server" CausesValidation="False" 
       CommandName="New" Text="New" /> 
     </ItemTemplate> 
    </asp:FormView>

的代码这是我的FormView

的问号在SqlDataSource的这部分代码是会话[“身份证”。我在前一页中分配Session [“id”]的值。

SelectCommand="SELECT * FROM [tblComputers] WHERE ([tblCLokaal_id] = ?)"

我不知道如何解决这个错误

非常感谢文森特

来源

2010-05-06 Vinzcent

的？是错误的，它应该是在@paramname的格式，

所以你选择

SelectCommand="SELECT * FROM [tblComputers] WHERE ([tblCLokaal_id] = @tblCLokaal_id)"

只注意到，如果该参数是在Session["id"]通过，那么它应该是

 <SelectParameters> 
      <asp:SessionParameter Name="tblCLokaal_id" SessionField="id" 
       Type="Int16" /> 
     </SelectParameters>

编辑

看着MSDN的？是可能的（但我没有使用过），但SessionField肯定需要是会话中对象的关键

来源

2010-05-06 17:31:09 Pharabus

感谢您的答案，但不幸的是它仍然无法正常工作。 – Vinzcent 2010-05-07 07:10:39

我改变了每一个？到@Something现在它可以工作。谢谢。 – Vinzcent 2010-05-07 14:08:33

C＃：没有为一个或多个必需的参数给出的FormView

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