Question

我正在尝试编写代码，只需单击按钮，就可以将字符串变量推送到页面上，然后打开该页面。我遇到的麻烦是变量，一个按钮的文本，嵌套在gridview中，使访问变得困难。这也很困难，因为我将它从SQL数据库导入Gridview，所以我也无法直接从那里访问它。如果我使用按钮的onClick事件，它适用于我当前的代码，但由于某种原因，我必须单击该按钮两次才能使其工作。我在这里读到了使用onPreRender事件，但这会干扰将字符串变量推送到页面上，而我无法做到这一点。是否有任何其他方法可以摆脱不必涉及onPreRender事件的按钮两次？

以下是代码：

    Imports System.Data.SqlClient
    Imports System.IO

    Partial Class PartsLookup
        Inherits System.Web.UI.Page


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

        End Sub

        Private Function FindControlRecursive(ByVal RootControl As Control, ByVal ControlID As String) As Control
            If RootControl.ID = ControlID Then
                Return RootControl
            End If

            For Each controlToSearch As Control In RootControl.Controls
                Dim controlToReturn As Control = FindControlRecursive(controlToSearch, ControlID)
                If controlToReturn IsNot Nothing Then
                    Return controlToReturn
                End If
            Next
            Return Nothing
        End Function

        Protected Sub Button1Click(ByVal sender As Object, ByVal e As System.EventArgs)
            Dim clickedButton As Button = sender
            MsgBox(clickedButton.Text)
            Dim ControlText As Control = FindControlRecursive(GridView1, clickedButton.ID)
            Dim ControlText1 As Button = ControlText
            Dim MachineNumber As String = ControlText1.Text
            If MachineNumber = "" Then
                ControlText1.Visible = False
            End If
            Dim SpecificPart() As String = {String that is the files contents, the middle of which is where the variable will be pushed to}
            Dim path As String = "File path where the variable is to be pushed to"
            File.WriteAllLines(path, SpecificPart)
            clickedButton.PostBackUrl = "~/PartNumberPages/PartTemplate.aspx"
        End Sub
    End Class

Visual Studio必须单击按钮两次

0 个答案: