Question

目标：传递一个值，即SQL DB中的整数，并返回文本值

问题：要从Eval获取值到函数我似乎必须放入.tostring，这使得字符串不是数字。如果我尝试使用下面的convert.toint32，则不会传递任何值。我最后尝试使用.tostring。

检查：没有Eval我得到网格中显示的数字，当使用没有转换的.tostring传递数字时，因为字符串然后在搜索失败，因为我不能让字符串成为数字？！

我查看了各种论坛讨论，尤其是Converting value of an Eval from int to string

代码：

的.aspx

  <%# RiskIDToText(Convert.ToInt32(Eval("RiskID")))%>

.aspx.vb

Public Function RiskIDToText(ByVal vRiskIDString As Integer) As Integer

        Dim vString As String = ""

        Dim sConnString As String = System.Web.Configuration.WebConfigurationManager.ConnectionStrings("SQL").ConnectionString
        Dim dsNames As SqlDataSource

        dsNames = New SqlDataSource
        dsNames.ConnectionString = sConnString
        Dim sSQL As String

        sSQL = "SELECT RiskCategories,RiskCatID FROM TblRisks_Categories WHERE RiskCatID =  '& vRiskIDString & '"
        dsNames.SelectCommand = sSQL

        For Each datarow As Data.DataRowView In dsNames.Select(DataSourceSelectArguments.Empty)

            vString = datarow("RiskCategories").ToString

        Next

        Return vString

    End Function

Answer 1

尝试更改您的函数声明：

Public Function RiskIDToText(ByVal vRiskIDString As Integer) As String
      dim vRiskIDStr= cstr(vRiskIDString)  ''use vRiskIDStr in db query.

其余代码保持不变。

Answer 2

的.aspx

   <%# RiskIDToText((Eval("RiskID")))%>

.aspx.vb

 Public Function RiskIDToText(ByVal vRiskIDString As String) As String

    Dim vString As String = ""

    Dim sConnString As String = System.Web.Configuration.WebConfigurationManager.ConnectionStrings("SQL").ConnectionString
    Dim dsNames As SqlDataSource

    dsNames = New SqlDataSource
    dsNames.ConnectionString = sConnString
    Dim sSQL As String

    sSQL = "SELECT RiskCategories,RiskCatID FROM TblRisks_Categories WHERE RiskCatID =  '" & vRiskIDString & "' "
    dsNames.SelectCommand = sSQL

    For Each datarow As Data.DataRowView In dsNames.Select(DataSourceSelectArguments.Empty)

        vString = datarow("RiskCategories").ToString

    Next

    Return vString

End Function

将Eval整数传递给函数

2 个答案: