Question

我有YearField，它是我数据库中的字符串。我想编写一个函数，以允许用户能够使用Between搜索YearField。

`Public Function DoubleQuote(strInput As String, intElement As Integer) As String

Dim a() As String
Dim b() As String
Dim i As Integer

ReDim b(0)

a = Split(strInput, Chr(34))
'   ***** See comments re using -1 *******
For i = 0 To UBound(a) - 1

    If Len(a(i)) = 0 Then
        b(UBound(b)) = Chr(34) & a(i + 1) & Chr(34)
        i = i + 1
    Else
        b(UBound(b)) = a(i)

    End If

    ReDim Preserve b(UBound(b) + 1)

Next i

DoubleQuote = b(intElement)

End Function`

我在动态linq行中遇到以下错误。

没有适用的方法＆＃39; ToInt32＆＃39;存在于＆＃39;转换＆＃39;

中

我也用以下内容替换searchQuery，但是没有工作，出现了同样的错误。

string fromYear = tbxFromYear.Text;
string toYear = tbxToYear.Text;
searchQuery = "Convert.ToInt32(YearField) > (@0) && Convert.ToInt32(YearField) < (@1)";

var result = db.selectDataFromSharedView().AsQueryable().
                   Where(searchQuery, Convert.ToInt32(fromYear),Convert.ToInt32(ToYear)).OrderBy("YearField Descending").ToList();

Answer 1

你能试试吗？

int fromYear = Convert.ToInt32(tbxFromYear.Text);
int toYear = Convert.ToInt32(tbxToYear.Text);

var values = new[] {fromYear, toYear };

searchQuery = "Convert.ToInt32(YearField) > @0 AND Convert.ToInt32(YearField) < @1";

var result = db.selectDataFromSharedView().AsQueryable()
                  .Where(searchQuery, values )
                  .OrderBy("YearField Descending")
                  .ToList();

如何在Dynamic Linq之间搜索年份

1 个答案: