Question

我遇到问题，我的try catch块在错误中运行：

database is not available

我的问题是try catch运行并捕获错误，但它不会重定向到我的错误页面。代码继续执行其他子服务。我尝试添加：退出，返回， response.end 。他们都没有工作。谢谢你的帮助。

    Imports System.Data
    Imports EUC
    Imports System.Threading
    Imports System.Data.SqlClient

    Partial Class mpMain
        Inherits System.Web.UI.MasterPage

        Dim strSQL As String
        Dim objData As clsDataAccess = New clsDataAccess()
        Dim ds As New D

ataSet
    Dim t1 As DataTable
    Dim intSecurityLevel As String = 0
    Dim strUser As String = UCase(Right(HttpContext.Current.User.Identity.Name.ToString(), 4))

    Protected Sub ExpandNode(ByVal NodeName As String, ByVal PageName As String)

    'More Code

    End Sub


    Protected Sub ExpandNode2(ByVal NodeNameMain As String, ByVal NodeName As String, ByVal PageName As String)

    'More Code

    End Sub


    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load


            If Not (IsPostBack) Then

                Try
                    strSQL = "Select SecurityLevel from tblSecurity where SFID = @SFID order by SecurityLevel"

                    Dim MyParameters1 As SqlParameter() = { _
                        New SqlParameter("@SFID", SqlDbType.VarChar) _
                    }

                    MyParameters1(0).Value = UCase(Right(HttpContext.Current.User.Identity.Name.ToString(), 4))

                    ds = objData.SQLExecuteDataset(strSQL, CommandType.Text, MyParameters1)

                    t1 = ds.Tables(0)

                Catch ex As Exception

                    Dim sendError As New clsExceptionMessage
                    sendError.sendMessage(ex.Message, Request.Path, strSQL)
                    Response.Redirect("ErrorMessage.aspx", False)

                End Try

            End If

    End Sub

    Protected Sub TreeView1_TreeNodeDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.TreeNodeEventArgs) Handles TreeView1.TreeNodeDataBound

    'More Code

    End Sub


    Protected Sub TreeView1_DataBound(ByVal sender As Object, ByVal e As System.EventArgs) Handles TreeView1.DataBound

    'More Code

    End Sub


End Class

Answer 1

首先我会捕获SQLException，你很少想要捕获一般异常。

在catch块中，设置一个布尔参数，例如

hasError = True

并且一旦在try..catch块之外检查这是真的并从那里重定向。

ASP NET在错误后停止执行其他子proc

1 个答案: