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ASP.net C＃和mysql中的下拉列表

[英]Dropdownlist in ASP.net C# and mysql

 原文  2010-11-15 06:08:38  0   3    c#/ asp.net

問題描述

我在此表中有一個表“ TYPE”，我有2列作為“ SKEY”和“ CASECODE”。

“ SKEY”包含文本值，“ CASECODE”包含相應的數值。

我已經將'SKEY'列中的值綁定到ASP.net 3.5 C＃中的DropdownList控件，我想要的是選擇DropdownList中的一項時，應顯示'CASECODE'列中的相應值。

我已經為下拉列表創建了一個數據源，我想讓用戶可見的DataTextField是SKEY列中的值，而dropdownlistDataValueField是來自'casecode'列中的值，但是當我嘗試這樣做時 

<asp:DropDownList ID="DropDownList3" runat="server" 
            DataSourceID="SqlDataSource1" DataTextField="skey" DataValueField="casecode" 
            AppendDataBoundItems="True">
            <asp:ListItem Selected="True" Value="S">Select</asp:ListItem>
        </asp:DropDownList>

DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'casecode'.


Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'casecode'.

我的.aspx代碼 

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit.HTMLEditor" tagprefix="cc1" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form title="orderfrm"  id="form1" runat="server" onsubmit="validate()" >
    <div>
        <br />
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        <b>

        <asp:Label ID="Label1" runat="server" style="font-size: x-large" 
            Text="Order Modify"></asp:Label>

        <br />
        </b>
        <br />
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

        <asp:Label ID="Label2" runat="server" style="font-weight: 700" 
            Text="High Court:"></asp:Label>
&nbsp;

<asp:DropDownList ID="DropDownList1" runat="server" 
            >
            <asp:ListItem>Panaji</asp:ListItem>
        </asp:DropDownList>
        &nbsp;
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

        <asp:Label ID="Label3" runat="server" style="font-weight: 700" 
            Text="Stmp/Regn.:"></asp:Label>

        &nbsp;&nbsp;


        <asp:DropDownList ID="DropDownList2" runat="server">
            <asp:ListItem Value="R">Registrer</asp:ListItem>
            <asp:ListItem Value="S">Stamp</asp:ListItem>
        </asp:DropDownList>

        <br />
        <br />
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

        <asp:Label ID="Label4" runat="server" style="font-weight: 700" Text="Type:"></asp:Label>

        &nbsp;

        <asp:DropDownList ID="DropDownList3" runat="server" 
            DataSourceID="SqlDataSource1" DataTextField="skey" DataValueField="casecode" 
            AppendDataBoundItems="True">
            <asp:ListItem Selected="True" Value="S">Select</asp:ListItem>
        </asp:DropDownList>

        <asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" 
            ControlToValidate="DropDownList3" ErrorMessage="Select Case Type" 
            InitialValue="S">*</asp:RequiredFieldValidator>


        <asp:SqlDataSource ID="SqlDataSource1" runat="server" 
            ConnectionString="<%$ ConnectionStrings:ConnectionString2 %>" 
            ProviderName="<%$ ConnectionStrings:ConnectionString2.ProviderName %>" 
            SelectCommand="SELECT testcase.casetype.skey FROM testcase.casetype">
        </asp:SqlDataSource>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

        <asp:Label ID="Label5" runat="server" style="font-weight: 700" Text="No"></asp:Label>

&nbsp;&nbsp;
        <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>

        <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" 
            ControlToValidate="TextBox2" ErrorMessage="Enter Case No">*</asp:RequiredFieldValidator>

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        <asp:Label ID="Label6" runat="server" style="font-weight: 700" Text="Year:"></asp:Label>
&nbsp;&nbsp;

        <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>

        <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" 
            ControlToValidate="TextBox3" ErrorMessage="Enter Year">*</asp:RequiredFieldValidator>

        <asp:RegularExpressionValidator ID="RegularExpressionValidator2" runat="server" 
            ControlToValidate="TextBox3" ErrorMessage="Enter Valid Year" 
            ValidationExpression="^\d{4}$"></asp:RegularExpressionValidator>


        <br />
        <br />
        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        <asp:Label ID="Label7" runat="server" style="font-weight: 700" 
            Text="Order Date"></asp:Label>


        &nbsp;&nbsp;&nbsp;
        <asp:TextBox ID="TextBox4" runat="server"></asp:TextBox>


        <asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" 
            ControlToValidate="TextBox4" ErrorMessage="Enter Date">*</asp:RequiredFieldValidator>


        <asp:Label ID="Label8" runat="server" style="font-weight: 700" 
            Text="(dd/mm/yyyy)"></asp:Label>

        <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" 
            ControlToValidate="TextBox4" ErrorMessage="Enter Valid Date" 
            ValidationExpression="^(0[1-9]|[12][0-9]|3[01])[- /.](0[1-9]|1[012])[- /.](19|20)\d\d$"></asp:RegularExpressionValidator>

        &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
        <br />
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

        <asp:Button ID="Button2" runat="server" style="font-weight: 700" Text="Go" 
            onclick="Button2_Click"/>

        <asp:ValidationSummary ID="ValidationSummary1" runat="server" />
        <br />
    </div>

    <cc1:Editor ID="Editor1" runat="server" AutoFocus="true" Height="200px" Width="500px" ActiveMode="Design" Font-Strikeout="false" />
    <br />



  <asp:ScriptManager ID="ScriptManager2" 
  runat="server" > </asp:ScriptManager>


    <br />
    <br />
    <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Show" />
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
    <asp:Button ID="Button3" runat="server" onclick="Button3_Click" Text="Select" />
    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
    <asp:Button ID="Button4" runat="server" onclick="Button4_Click" 
        Text="next page" />
    </form>
</body>
</html>

3 個解決方案

解決方案1
 0  2010-11-15 06:25:27

嘗試綁定您的DataTextField和DataValueField- 

dropdownlist.DataSource = <GetData>();
dropdownlistDataTextField="<SKEY column values>"; 
dropdownlistDataValueField="<CASECODE column values>";
dropdownlist.DataBind();

解決方案2
 0  2010-11-15 06:29:06

我不確定您要問的是什么，但是dropdownlist.SelectedValue將為您casecode在這種情況下為案例代碼的值。

解決方案3
 0 已采納  2010-11-15 07:41:41

數據源的select命令不包含名為casecode的字段： 

<asp:SqlDataSource ID="SqlDataSource1" runat="server" 
        ConnectionString="<%$ ConnectionStrings:ConnectionString2 %>" 
        ProviderName="<%$ ConnectionStrings:ConnectionString2.ProviderName %>" 
        SelectCommand="SELECT testcase.casetype.skey FROM testcase.casetype">
</asp:SqlDataSource>

可能您想將SelectCommand編輯為如下所示（取決於數據庫的外觀）： 

SelectCommand="SELECT testcase.casetype, testcase.casetype.skey FROM testcase.casetype"

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