Question

<AjaxPro.AjaxMethod(AjaxPro.HttpSessionStateRequirement.Read)> _
Public Function HandleSelect(ByVal table As String, ByVal eventSource As String, ByVal filterValue As String, ByVal targetControl As String) As StreetNameResponse

    Dim tName As TableName
    Dim filter As String = Nothing
    Dim sort As String = Nothing
    Dim textField As String = Nothing
    Dim valueField As String = Nothing
    Dim name As String = Nothing
    Dim onChange As String = Nothing
    'Assign security filter
    CheckSecurityFilter()

    Select Case table.ToLower
        Case "county"
            tName = TableName.County
            If filterValue = "-1" Or filterValue = "" Then
                If _restrictionLevel = RestrictionLevel.District Then
                    filter = _restrictionFilter
                End If
            Else
                filter = String.Format("maintdisnmbr in ({}0)", filterValue)
            End If
            tName = TableName.County
            sort = "countyname ASC"
            textField = "countyname"
            valueField = "countynmbr"
            name = "selCounty"
            onChange = "CheckSubmitEnabled();ajaxGetSelect('city','county', this, 'spanCity')"
        Case "city"
            If filterValue = "-1" Or filterValue = "" Then
                'No value selected, set the filter to the default security value
                If _restrictionLevel = RestrictionLevel.District Or _restrictionLevel = RestrictionLevel.County Then
                    filter = _restrictionFilter
                End If
            Else
                Select Case eventSource.ToLower
                    Case "district"
                        filter = String.Format("maintdisnmbr in ({0})", filterValue)
                    Case "county"
                        filter = String.Format("countynmbr in ({0})", filterValue)
                End Select
            End If

            tName = TableName.MasterCity
            sort = "sams_cityname ASC"
            textField = "sams_cityname"
            valueField = "cityname_value"
            name = "selCity"
            onChange = "CheckSubmitEnabled()"
    End Select
    Dim selOutput As HtmlSelect = BuildSelect(tName, filter, sort, textField, valueField, name, onChange)
    Dim outControl As New StreetNameResponse
    outControl.targetControl = targetControl
    outControl.outputControl = selOutput
    MyBase.ProperCaseSelectControl(selOutput)
    Return outControl
End Function

在上面的代码中，我遇到了调试问题。关键在于HTML我有三个选择标签。区，县，市。如果您选择一个区域，它应该更新县和城市以仅限制该区域中的县或城市。城市运作完美但县没有。我发现当运行上面的代码时，如果它运行通过County Case段，它只会停止filter = String.Format（“maintdisnmbr in（{} 0）”，filterValue）。如果我逐步执行代码，则代码无法完成。如果我不一步一步地向前跳，它会给我一个错误，说输入字符串没有格式化。这不是我的代码，我没有使用Ajax，但我必须解决它，请帮助至少弄清楚问题会很棒。

Answer 1

此：

“maintdisnmbr in（{} 0）”

应该是这样的：

“maintdisnmbr in（{0}）”

但如果你想要容易受到sql注入攻击。如果你想要好的代码，你将阅读关于正确地将列表传递给sql server的这一系列文章：

http://www.sommarskog.se/arrays-in-sql.html

Ajax调用在代码中途停止

1 个答案: