请大家帮忙看看,多条件查询的问题 代码功能主要是在指定时间与识别号的综合查询，并将数据显示在dataGrid上。 Private Sub btnStat_Click(...) Dim strFilter As String If txbIDCard.Text.Trim.Length <> 0 Then strFilter = "where 识别号 like '' " strFilter += txbIDCard.Text.Trim + "% '' " End If Dim d1 As Date = Me.DateTimePicker1.Value Dim d2 As Date = Me.DateTimePicker2.Value Dim connectionString As String = "Persist Security Info=False;Integrated Security=SSPI;Database=shipping;Server=localhost " Dim da As New sqlClient.sqlDataAdapter da.SelectCommand.CommandText = "SELECT 预定单号,入库时间,出库时间,识别号 FROM 预定单 WHERE 入库时间> = '' " & d1 & " '' AND 出库时间 <= '' " & d2 & " '' " + strFilter ''问题可能在这 Dim ds As New DataSet da.Fill(ds) dataGrid1.DataSource = ds.Tables(0) end sub 问题可能是strFilter与入出库时间的联合查询上，请大家帮我改改，谢谢了。 __________________________________________________________________________ 检查下da.SelectCommand.CommandText的输出信息 你会发现da.SelectCommand.CommandText 多了一个where~~~ 改: If txbIDCard.Text.Trim.Length <> 0 Then strFilter = "and 识别号 like '' " strFilter += txbIDCard.Text.Trim + "% '' " End If __________________________________________________________________________ 一看就知道两个条件连不起来..你的加号在里面没有用.用AND连接. __________________________________________________________________________ 楼上的hainannewcon，请问怎么解决？ __________________________________________________________________________ 没有全部看完。 strFilter = "where 识别号 like '' " strFilter += txbIDCard.Text.Trim + "% '' " 将这里的where 去掉，在 += 后加个 and. 写的好乱。 __________________________________________________________________________ + strFilter ----〉and strFilter 看这样能连上不． __________________________________________________________________________ 先谢谢各位的指教 “在 += 后加个 and.”会出现语法错误 + strFilter ----〉and strFilter 问题还在 __________________________________________________________________________ Private Sub btnStat_Click(...) Dim strFilter As String If txbIDCard.Text.Trim.Length <> 0 Then strFilter = " 识别号 like '' " strFilter += txbIDCard.Text.Trim + "% '' " End If Dim d1 As Date = Me.DateTimePicker1.Value Dim d2 As Date = Me.DateTimePicker2.Value Dim connectionString As String = "Persist Security Info=False;Integrated Security=SSPI;Database=shipping;Server=localhost " Dim da As New sqlClient.sqlDataAdapter da.SelectCommand.CommandText = "SELECT 预定单号,识别号 FROM 预定单 WHERE 入库时间> = '' " & d1 & " '' AND 出库时间 <= '' " & d2 & " '' " and strFilter '' Dim ds As New DataSet da.Fill(ds) dataGrid1.DataSource = ds.Tables(0) end sub ============= 这样可能可以，我没有调试过．你可以调试下，注意看看ＳＥＬＥＣＴ前面的引号有没有对应结束的引号． __________________________________________________________________________ Dim da As New sqlClient.sqlDataAdapter( "SELECT 预定单号,识别号 FROM 预定单 WHERE 入库时间> = '' " & d1 & " '' AND 离开时间 <= '' " & d2 & " '' " & strFilter,connectionString)，试试 __________________________________________________________________________ and 要用 & " " & 这样才行的。以字符串加进去。 __________________________________________________________________________ 原文链接：https://www.f2er.com/vb/263901.html