ASP.net VB DetailsView插入：有關取消問題的javascript回發

Question

在我的ASP.net應用程序中，在Detailsview上使用ItemInserting，我正在使用javascript函數向用戶顯示確認框。 確認框基本上顯示來自數據庫的查詢結果。

此工作正常，除了即使用戶單擊“取消”也會發生回發。

我確定我在這里缺少基本知識，專家可以幫忙嗎？ 感謝您的答復。 我確實在整個網站上進行了搜索，但是大多數解決方案都使用按鈕上的onClick事件。 我不確定如何在這里工作。

更新：基於TheGeekYouNeed建議，我嘗試在腳本中添加一個條件。 現在彈出窗口不再顯示了。 任何人？

 Protected Sub CustomerDetail_ItemInserting(sender As Object, e As System.Web.UI.WebControls.DetailsViewInsertEventArgs)
    Dim args As String = e.Values("WriteID").ToString()

    For Each drv As Data.DataRowView In SqlDataSource3.[Select](DataSourceSelectArguments.Empty)
        If drv("WriteID") = args Then


            Dim ConnString As String = "Data Source=75409CHQ4034\SQLEXPRESS;Initial Catalog=ExpenseTracker;Integrated Security=True"
            Dim SQLConn As New SqlConnection()
            Dim SQLCmd As New SqlCommand()
            Dim SQLdr As SqlDataReader

            SQLConn.ConnectionString = ConnString 'Set the Connection String
            SQLConn.Open() 'Open the connection
            SQLCmd.Connection = SQLConn 'Sets the Connection to use with the SQL Command
            SQLCmd.CommandText = "Select  Top 1 Budget - Difference as 'Remaining' FROM ExpenseImageAudit where WriteID =" + "'" + args + "' Group by ID, Budget-Difference order by ID desc "

            'Sets the SQL String
            SQLdr = SQLCmd.ExecuteReader 'Gets Data

            While SQLdr.Read() 'While Data is Present

                TextBox8.Text = SQLdr("Remaining")

                Dim script As String = String.Format("<script type='text/javascript'>confirmBudget({0});</script>", TextBox8.Text)
                Page.ClientScript.RegisterStartupScript(Me.[GetType](), "script", script)
            End While
        SQLdr.Close() 'Close the SQLDataReader
        SQLConn.Close() 'Close the connection

        End If

    Next
End Sub

腳本：

    <script type="text/javascript">
    function confirmBudget(amount) {
        return confirm('Based on your last transaction, your amount left is' + amount + '. Do you want to proceed?');
    }        
</script>

Answer 1

將此腳本放在aspx頁面的頭部。

<script type="text/javascript">
   function confirmBudget(amount)
   {
      if(confirm('Based on your last transaction, your amount left is' + amount + '. Do you want to proceed?'))
      {
         document.getElementById("btnDoSomethingOnOK").click();
      }

   }
</script>

從服務器端代碼這樣調用它：

string script = string.Format("<script type='text/javascript'>confirmBudget({0});</script>", TextBox8.Text);

Page.ClientScript.RegisterStartupScript(this.GetType(), "script", script);

對不起，C＃語法。 我不知道vb。

Answer 2

在您的Javascript中，返回答案。

Dim script As String = "<script language='javascript'>var a=' " + TextBox8.Text & "'; var answer = confirm('Based on your last transaction, your amount left is '+ a + '. Do you want to proceed?'); return answer; </script>"