Question

我想在代码后面设置以下linqdatasource where子句。

<asp:LinqDataSource ID="lds" runat="server" ContextTypeName="dcDataContext"
    TableName="vStaff_Currents" OrderBy="Department,DisplayName" >
</asp:LinqDataSource>

代码背后的

：

Dim filterString As String = ""

Dim AtDate As Date = Nothing

AtDate = Request("PeriodEnd").ToDate

filterString = "xxxxxxxxxxx"

filterString = filterString & "xxxxxxxxxxx"

lds.Where = filterString

我想在querystring [Request("PeriodEnd")]

的where子句中插入日期时间条件

我尝试了不同的命令，但它返回错误

选项1：

filterString = filterString & " and (RenumerationDate <= DateTime.Parse(" & AtDate & "))"

错误：

“DateTime”

类型中没有适用的方法“Parse”

选项2：

filterString = filterString & " and (RenumerationDate <= " & AtDate.ToString("dd-mm-yyyy") & " )"

错误：

运算符'＆lt; ='与操作数类型'DateTime不兼容？'和'Int32'

如何在代码中添加where子句？感谢

Answer 1

解决方案是：

filterString = filterString & " and (RenumerationDate <= DateTime.Parse(""" & AtDate & """))"

Answer 2

试试这种方式

filterString = filterString & " and (RenumerationDate <= " & DateTime.Parse(AtDate) & ")"

或

filterString = filterString & " and (RenumerationDate <= " & Convert.ToDateTime(AtDate) & ")"

使用datetime列设置LinqDataSource Where子句时出错

2 个答案: