以编程方式声明变量时“必须声明标量变量”错误

这是一个头部划痕器（至少对我而言）。以编程方式声明变量时“必须声明标量变量”错误

我有一个GridView，用户可以在页脚中输入多个数据字段的信息。在一般情况下，它们的格式如下：

<asp:TemplateField HeaderText="Date" ItemStyle-HorizontalAlign="Center"> 
<FooterTemplate> 
    <asp:TextBox ID="NewDate" runat="server" Width="25px" Height="10px" Font-Size="Smaller" ValidateRequestMode="Disabled"></asp:TextBox> 
    <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="NewDate" Display="Dynamic" ErrorMessage="You must enter a valid date (MM/DD/YYYY) before submitting...">*</asp:RequiredFieldValidator> 
</FooterTemplate> 
<ItemTemplate> 
    <asp:Label ID="Label1" runat="server" Text='<%# Bind("WeekOf","{0:MM/dd}") %>'></asp:Label> 
</ItemTemplate>

InsertCommand会是这样的（广义）：

InsertCommand="INSERT INTO [Table] (WeekOf,User,OtherData) 
     VALUES (Convert(Date,@WeekOf,101), @User, @OtherData)">

凡@user是由工作正常的InsertParameter控制（我知道这是因为它是与我的功能SelectCommand/SelectParameter完全相同）。

不管怎么说，因为这些字段在gridview中，我不能为它们分配静态InsertParameters，因为它们在GridView的页脚中，由于行数发生了变化（我知道......对任何启示如何这样做将是真棒），所以我想以编程方式声明变量，如this，但是我得到一个“必须声明标量变量‘@WeekOf’错误这是我的GridView_RowCommand功能的总体思路：

TextBox WeekOfin = SalesReportingGridView.FooterRow.FindControl("NewDate") as TextBox; 
TextBox OtherDatain = SalesReportingGridView.FooterRow.FindControl("NewOtherData") as TextBox; 

SqlParameter WeekOf = new SqlParameter("@WeekOf", SqlDbType.VarChar, 30); 
WeekOf.Direction = ParameterDirection.Input; 
WeekOf.Value = WeekOfin.Text; 
insertParameters.Add(WeekOf); 

SqlParameter OtherData = new SqlParameter("@OtherData", SqlDbType.Int); 
OtherData.Direction = ParameterDirection.Input; 
OtherData.Value = OtherDatain.Text; 
insertParameters.Add(OtherData); 

SqlDataSource2.Insert();

以下是完整的相关代码 -

 private List<SqlParameter> insertParameters = new List<SqlParameter>(); 

    protected void SqlDataSource2_Inserting(object sender, SqlDataSourceCommandEventArgs e) 
    { 
     e.Command.Parameters.Clear(); 
     foreach (SqlParameter p in insertParameters) 
      e.Command.Parameters.Add(p); 

    } 

    protected void SalesReportingGridView_RowCommand(object sender, GridViewCommandEventArgs e) 
    { 
     if (e.CommandName == "Insert" && Page.IsValid) 
     { 
      TextBox WeekOfin = SalesReportingGridView.FooterRow.FindControl("NewDate") as TextBox; 
      TextBox Data1in = SalesReportingGridView.FooterRow.FindControl("NewData1") as TextBox; 
      TextBox Data2in = SalesReportingGridView.FooterRow.FindControl("NewData2") as TextBox; 
      TextBox Data3in = SalesReportingGridView.FooterRow.FindControl("NewData3") as TextBox; 
      TextBox Data4in = SalesReportingGridView.FooterRow.FindControl("NewData4") as TextBox; 
      TextBox Data5in = SalesReportingGridView.FooterRow.FindControl("NewData5") as TextBox; 
      TextBox Data6in = SalesReportingGridView.FooterRow.FindControl("NewData6") as TextBox; 
      TextBox Data7in = SalesReportingGridView.FooterRow.FindControl("NewData7") as TextBox; 
      TextBox Data8in = SalesReportingGridView.FooterRow.FindControl("NewData8") as TextBox; 
      TextBox Data9in = SalesReportingGridView.FooterRow.FindControl("NewData9") as TextBox; 
      TextBox Data10in = SalesReportingGridView.FooterRow.FindControl("NewData10") as TextBox; 
      TextBox Data11in = SalesReportingGridView.FooterRow.FindControl("NewData11") as TextBox; 
      TextBox Data12in = SalesReportingGridView.FooterRow.FindControl("NewData12") as TextBox; 
      TextBox Data13in = SalesReportingGridView.FooterRow.FindControl("NewData13") as TextBox; 
      TextBox Data14in = SalesReportingGridView.FooterRow.FindControl("NewData14") as TextBox; 
      TextBox Data15in = SalesReportingGridView.FooterRow.FindControl("NewData15") as TextBox; 
      TextBox Data16in = SalesReportingGridView.FooterRow.FindControl("NewData16") as TextBox; 
      TextBox Data17in = SalesReportingGridView.FooterRow.FindControl("NewData17") as TextBox; 
      TextBox Data18in = SalesReportingGridView.FooterRow.FindControl("NewData18") as TextBox; 
      TextBox Data19in = SalesReportingGridView.FooterRow.FindControl("NewData19") as TextBox; 
      TextBox Data20in = SalesReportingGridView.FooterRow.FindControl("NewData20") as TextBox; 
      TextBox Data21in = SalesReportingGridView.FooterRow.FindControl("NewData21") as TextBox; 

      SqlParameter WeekOf = new SqlParameter("@WeekOf", SqlDbType.VarChar, 30); 
      WeekOf.Direction = ParameterDirection.Input; 
      WeekOf.Value = WeekOfin.Text; 
      insertParameters.Add(WeekOf); 

      SqlParameter Data1 = new SqlParameter("@Data1", SqlDbType.Int); 
      Data1.Direction = ParameterDirection.Input; 
      Data1.Value = Data1in.Text; 
      insertParameters.Add(Data1); 

      SqlParameter Data2 = new SqlParameter("@Data2", SqlDbType.Int); 
      Data2.Direction = ParameterDirection.Input; 
      Data2.Value = Data2in.Text; 
      insertParameters.Add(Data2); 

      SqlParameter Data3 = new SqlParameter("@Data3", SqlDbType.Int); 
      Data3.Direction = ParameterDirection.Input; 
      Data3.Value = Data3in.Text; 
      insertParameters.Add(Data3); 

      SqlParameter Data4 = new SqlParameter("@Data4", SqlDbType.Int); 
      Data4.Direction = ParameterDirection.Input; 
      Data4.Value = Data4in.Text; 
      insertParameters.Add(Data4); 

      SqlParameter Data5 = new SqlParameter("@Data5", SqlDbType.Int); 
      Data5.Direction = ParameterDirection.Input; 
      Data5.Value = Data5in.Text; 
      insertParameters.Add(Data5); 

      SqlParameter Data6 = new SqlParameter("@Data6", SqlDbType.Int); 
      Data6.Direction = ParameterDirection.Input; 
      Data6.Value = Data6in.Text; 
      insertParameters.Add(Data6); 

      SqlParameter Data7 = new SqlParameter("@Data7", SqlDbType.Int); 
      Data7.Direction = ParameterDirection.Input; 
      Data7.Value = Data7in.Text; 
      insertParameters.Add(Data7); 

      SqlParameter Data8 = new SqlParameter("@Data8", SqlDbType.Int); 
      Data8.Direction = ParameterDirection.Input; 
      Data8.Value = Data8in.Text; 
      insertParameters.Add(Data8); 

      SqlParameter Data9 = new SqlParameter("@Data9", SqlDbType.Int); 
      Data9.Direction = ParameterDirection.Input; 
      Data9.Value = Data9in.Text; 
      insertParameters.Add(Data9); 

      SqlParameter Data10 = new SqlParameter("@Data10", SqlDbType.Int); 
      Data10.Direction = ParameterDirection.Input; 
      Data10.Value = Data10in.Text; 
      insertParameters.Add(Data10); 

      SqlParameter Data11 = new SqlParameter("@Data11", SqlDbType.Int); 
      Data11.Direction = ParameterDirection.Input; 
      Data11.Value = Data11in.Text; 
      insertParameters.Add(Data11); 

      SqlParameter Data12 = new SqlParameter("@Data12", SqlDbType.Int); 
      Data12.Direction = ParameterDirection.Input; 
      Data12.Value = Data12in.Text; 
      insertParameters.Add(Data12); 

      SqlParameter Data13 = new SqlParameter("@Data13", SqlDbType.Int); 
      Data13.Direction = ParameterDirection.Input; 
      Data13.Value = Data13in.Text; 
      insertParameters.Add(Data13); 

      SqlParameter Data14 = new SqlParameter("@Data14", SqlDbType.Int); 
      Data14.Direction = ParameterDirection.Input; 
      Data14.Value = Data14in.Text; 
      insertParameters.Add(Data14); 

      SqlParameter Data15 = new SqlParameter("@Data15", SqlDbType.Int); 
      Data15.Direction = ParameterDirection.Input; 
      Data15.Value = Data15in.Text; 
      insertParameters.Add(Data15); 

      SqlParameter Data16 = new SqlParameter("@Data16", SqlDbType.Int); 
      Data16.Direction = ParameterDirection.Input; 
      Data16.Value = Data16in.Text; 
      insertParameters.Add(Data16); 

      SqlParameter Data17 = new SqlParameter("@Data17", SqlDbType.Int); 
      Data17.Direction = ParameterDirection.Input; 
      Data17.Value = Data17in.Text; 
      insertParameters.Add(Data17); 

      SqlParameter Data18 = new SqlParameter("@Data18", SqlDbType.Int); 
      Data18.Direction = ParameterDirection.Input; 
      Data18.Value = Data18in.Text; 
      insertParameters.Add(Data18); 

      SqlParameter Data19 = new SqlParameter("@Data19", SqlDbType.Int); 
      Data19.Direction = ParameterDirection.Input; 
      Data19.Value = Data19in.Text; 
      insertParameters.Add(Data19); 

      SqlParameter Data20 = new SqlParameter("@Data20", SqlDbType.Int); 
      Data20.Direction = ParameterDirection.Input; 
      Data20.Value = Data20in.Text; 
      insertParameters.Add(Data20); 

      SqlParameter Data21 = new SqlParameter("@Data21", SqlDbType.Int); 
      Data21.Direction = ParameterDirection.Input; 
      Data21.Value = Data21in.Text; 
      insertParameters.Add(Data21); 

      SqlDataSource2.Insert(); 
     } 
    } 
}

}

来源

2012-12-26 digitalfrenchfry

当你踩通了代码..它在哪里错误..什么是例外，你陷阱..你在哪里执行查询..？ – MethodMan

与论坛网站不同，我们不使用“谢谢”或“任何帮助表示赞赏”，或在[so]上签名。请参阅“[应该'嗨'，'谢谢'，标语和致敬从帖子中删除？]（http://meta.stackexchange.com/questions/2950/should-hi-thanks-taglines-and-salutations-be –

@DJKRAZE当我打开网站时，它通常会加载页面，但是当我尝试提交时，它会卡住SqlDataSource2.Insert（）;，下面的异常详细信息：“System.Data .SqlClient.SqlException：必须声明标量变量“@WeekOf”。“ – digitalfrenchfry

只看如何添加参数，并按照其作为模板，我将粘贴一段代码，让你开始，你将不得不填补剩下的这个例子..

这取决于你如何计算WeekOf我会放置或获得using语句之外的价值，并通过它在你正在尝试做的转换（日期，@ WeekOf，101）

using (SqlConnection connection = new SqlConnection(connectionString)) 
{ 
    SqlCommand cmd = new SqlCommand("InsertCommand="INSERT INTO [Table] WeekOf,User,OtherData) 
    VALUES (Convert(Date,@WeekOf,101), @User, @OtherData)""); 
    cmd.CommandType = CommandType.Text; 
    cmd.Connection = connection; 
    cmd.Parameters.AddWithValue("@WeekOf", WeekOfin.Text); 
    cmd.Parameters.AddWithValue("@User", YourUser.Text); 
    cmd.Parameters.AddWithValue("@OtherData", txtAddress.Text); 
    ... 
    ... 
    connection.Open(); 
    try 
    { 
     cmd.ExecuteNonQuery(); 
    } 
    catch (SqlException ex) 
    { 
     //MessageDlg.Show(ex.Message); //do what ever kind of logging or error trapping here that you want.. 
    } 
    //You will need to explain how you are populating or getting 
    // the MM/YY for WeekOf 
    //Personally I would refactor this code it's a bit unorthodox 
}

来源

2012-12-27 00:51:29 MethodMan

以编程方式声明变量时“必须声明标量变量”错误

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