単一のC＃ドロップダウン選択からクエリ文字列に値を渡す

Question

DropDownListとListBoxが正常に機能しています。ユーザーがProductsテーブルからListBoxのProductsMailテーブルに選択を移動すると、DropDownListから選択した値をデータベースに挿入できるようにする必要があります。私は"+EmailDDN.SelectedItem+"と"+EmailDDN.SelectedValue+"などのような成功なしのSQL文字列を複数回修正しようとしました。EmailLabel1ラベルに表示するために選択された値を取得できますが、クエリには表示されません。解決策を提示してください。 私はあなたの時間をいただきありがとうございます。 _ JT

こんにちはsuryakiran、 "DestinationDataSource" で

：

なしの成功と

"UPDATE ProductsMail SET Name = @Name, Email = ' + @Email + ', EmailID = @EmailID WHERE ID = @ID" and "UPDATE ProductsMail SET Name = @Name, Email = ' +EmailDDN.SelectedItem+ ', EmailID = @EmailID WHERE ID = @ID" 

その他：

UpdateCommand="UPDATE ProductsMail SET Name = @Name, Email = @Email, EmailID = @EmailID WHERE ID = @ID". 

私は、次のような修正を試みてきました。あなたは<UpdateParameters>セクションでこれを行うことにより、中にあなたの電子メールの値を渡すことができ<SelectParameters>セクションで<asp:ControlParameter>を使用していたのと同じ方法で

<telerik:RadScriptManager ID="ScriptManager" runat="server" /> 
<telerik:RadAjaxLoadingPanel runat="server" ID="RadAjaxLoadingPanel1" /> 
<telerik:RadAjaxPanel runat="server" ID="RadAjaxPanel1" LoadingPanelID="RadAjaxLoadingPanel1"> 
    <asp:SqlDataSource ID="SqlDataSource2" ConnectionString="<%$ ConnectionStrings:IPdataConnectionString %>" 
    ProviderName="System.Data.SqlClient" SelectCommand="SELECT DISTINCT Email FROM [aspnet_Membership]" 
    runat="server"></asp:SqlDataSource> 
    <label for="EmailDDN"> 
    <asp:Label ID="Label2" runat="server" class="text">Select Email:&nbsp;</asp:Label> 
    </label> 
    <asp:DropDownList ID="EmailDDN" runat="server" AutoPostBack="True" DataSourceID="SqlDataSource2" 
    AppendDataBoundItems="True" DataTextField="Email" DataValueField="Email" OnSelectedIndexChanged="DDN_SelectedIndexChanged"> 
    <asp:ListItem> 
      Select your email address 
    </asp:ListItem> 
    </asp:DropDownList> 
    <br /> 
    <br /> 
    <asp:Label ID="EmailLabel1" runat="server" /> 
    <br /> 
    <br /> 
    <br /> 
</telerik:RadAjaxPanel> 
<telerik:RadAjaxLoadingPanel runat="server" ID="RadAjaxLoadingPanel2" /> 
<telerik:RadAjaxPanel runat="server" ID="RadAjaxPanel2" LoadingPanelID="RadAjaxLoadingPanel1"> 
    <telerik:RadListBox runat="server" ID="RadListBox1" DataSourceID="SourceDataSource" 
    AllowAutomaticUpdates="true" DataKeyField="ID" DataTextField="Name" DataSortField="SortOrder" 
    Width="230px" Height="200px" AllowTransfer="true" TransferToID="RadListBox2" TransferMode="Copy" 
    AutoPostBackOnTransfer="true" /> 
    <telerik:RadListBox runat="server" ID="RadListBox2" DataSourceID="DestinationDataSource" 
    AllowAutomaticUpdates="true" DataKeyField="ID" DataTextField="Name" DataSortField="SortOrder" 
    Width="230px" Height="200px" AllowReorder="true" AutoPostBackOnReorder="true" AllowDelete="True" 
    AutoPostBackOnDelete="true" /> 
</telerik:RadAjaxPanel> 
<asp:SqlDataSource ID="SourceDataSource" runat="server" ConnectionString="<%$ ConnectionStrings:IPdataConnectionString %>" 
    ProviderName="System.Data.SqlClient" DeleteCommand="DELETE FROM Products WHERE ID = @ID" 
    InsertCommand="INSERT INTO Products (Name, ID, Email, EmailID) VALUES (@Name, @ID, @Email, @EmailID)" 
    SelectCommand="SELECT Name, ID, Email FROM Products" UpdateCommand="UPDATE Products SET Name = @Name, Email = @Email, EmailID = @EmailID WHERE ID = @ID"> 
    <UpdateParameters> 
    <asp:Parameter Name="Name" Type="String" /> 
    <asp:Parameter Name="ID" Type="Int32" /> 
    <asp:Parameter Name="Email" Type="String" /> 
    <asp:Parameter Name="EmailID" Type="Int32" /> 
    </UpdateParameters> 
    <DeleteParameters> 
    <asp:Parameter Name="ID" Type="Int32" /> 
    </DeleteParameters> 
    <InsertParameters> 
    <asp:Parameter Name="Name" Type="String" /> 
    <asp:Parameter Name="ID" Type="Int32" /> 
    <asp:Parameter Name="Email" Type="String" /> 
    <asp:Parameter Name="EmailID" Type="Int32" /> 
    </InsertParameters> 
    <SelectParameters> 
    <asp:ControlParameter ControlID="EmailDDN" DefaultValue="Select One" Name="Email" 
     PropertyName="SelectedValue" /> 
    </SelectParameters> 
</asp:SqlDataSource> 
<asp:SqlDataSource ID="DestinationDataSource" runat="server" ConnectionString="<%$ ConnectionStrings:IPdataConnectionString %>" 
    ProviderName="System.Data.SqlClient" DeleteCommand="DELETE FROM ProductsMail WHERE ID = @ID" 
    InsertCommand="INSERT INTO ProductsMail (Name, ID, Email, EmailID) VALUES (@Name, @ID, @Email, @EmailID)" 
    SelectCommand="SELECT Name, ID, Email FROM ProductsMail" UpdateCommand="UPDATE ProductsMail SET Name = @Name, Email = @Email, EmailID = @EmailID WHERE ID = @ID"> 
    <UpdateParameters> 
    <asp:Parameter Name="Name" Type="String" /> 
    <asp:Parameter Name="Email" Type="String" /> 
    <asp:Parameter Name="EmailID" Type="Int32" /> 
    <asp:Parameter Name="ID" Type="Int32" /> 
    </UpdateParameters> 
    <DeleteParameters> 
    <asp:Parameter Name="ID" Type="Int32" /> 
    </DeleteParameters> 
    <InsertParameters> 
    <asp:Parameter Name="Name" Type="String" /> 
    <asp:Parameter Name="Email" Type="String" /> 
    <asp:Parameter Name="EmailID" Type="Int32" /> 
    <asp:Parameter Name="ID" Type="Int32" /> 
    </InsertParameters> 
    <SelectParameters> 
    <asp:ControlParameter ControlID="EmailDDN" DefaultValue="Select One" Name="Email" 
     PropertyName="SelectedValue" /> 
    </SelectParameters> 
</asp:SqlDataSource> 
============================================ 
============================================ 
protected void DDN_SelectedIndexChanged(System.Object sender, System.EventArgs e) 
{ 
    EmailLabel1.Text = EmailDDN.SelectedItem.ToString(); 
} 

Answer 1

。

<InsertParameters> 
    <asp:Parameter Name="Name" Type="String" /> 
    <asp:ControlParameter Name="Email" PropertyName="SelectedValue" ControlID="EmailDDN" /> 
    <asp:Parameter Name="EmailID" Type="Int32" /> 
    <asp:Parameter Name="ID" Type="Int32" /> 
    </InsertParameters>