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Dynamic button onclick to run code

Posted on 2007-12-03
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Last Modified: 2010-08-05
Hi,

I'm working in VS using vb.net with 1.1 framework. I am dynamically creating a button, but I cannot get the button to run the Function I need it to run. This is the code I am using to create the button in my code behind page:
  vHTML = vHTML & "<tr>"
                vHTML = vHTML & "<td colspan='7' align='center'>"
                vHTML = vHTML & "<input type='Submit' name ='Submit' onClick=""MarkContacted()"" value='Mark as Contacted'>"
                vHTML = vHTML & "</td>"
                vHTML = vHTML & "</tr>"
                vHTML = vHTML & "</table>"

This is the code for the function I need it to run:

 Private Function MarkContacted()
        Dim Myconn As SqlConnection
        Dim Mycomm As SqlCommand
        Dim sql As String
        Dim Success As Boolean
        Dim vDate As String
        vDate = Request("frmContactDate")    

        Dim i
        Dim vIdArray
        'Make sure something is in the collection
        If Request("Contact") = "" Then
            Response.Write("Nothing was checked!<br>")
        Else
            'Split it by comma
            vIdArray = Split(Trim(Request("Contact")), ",")
            'Open DB connection (I didnt do this)
            Try
                Myconn = New SqlConnection(ConfigurationSettings.AppSettings("connstr"))
                Myconn.Open()
                'Loop through the collection
                For i = 0 To UBound(vIdArray)
                    'build sql string
                    sql = "UPDATE tbl_eeocm_data SET [LastDateOfContact] = '" & Request("frmContactDate") & "' WHERE ID = " & vIdArray(i)
                    Mycomm = New SqlCommand(sql, Myconn)
                    Mycomm.ExecuteNonQuery()
                    Success = True
                    'Response.Write("update where id = " & vIdArray(i) & "<br>")
                    Response.Write(sql)
                    'Update record here (I didnt do this)
                Next
                'close the connection (I didnt do this)
                Myconn.Close()
            Catch Ex As Exception
                Success = False
                Response.Write("<br>" & sql & "<br><br>")
                Response.Write("<p><strong>An Error Occurred:</strong> " & Ex.ToString() & "</p>" & vbCrLf)
                Response.Write(sql & "<br>")
            Finally
                Myconn.Close()
            End Try
        End If
        ' ===============================================================
    End Function


Can anyone tell me what I am doing wrong?? I would really appreciate the help. Thanks!
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Question by:savache27
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3 Comments
 
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Accepted Solution

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samtran0331 earned 2000 total points
ID: 20396195
when you do this:
vHTML = vHTML & "<input type='Submit' name ='Submit' onClick=""MarkContacted()"" value='Mark as Contacted'>"


the onclick event is a client-side javascript, so the rendered html thinks that MarkContacted is javascript not server code.

Ideally, in ASP.Net, you shouldn't have to build an html table as a string...what's the "bigger picture" here?
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Author Comment

by:savache27
ID: 20396900
Thank you for the explanation. I've decided not to build the button dynamically.
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LVL 37

Expert Comment

by:samtran0331
ID: 20396935
Just keep in mind that you can add buttons dynamically, but to make life easier, they should be "<asp:button..>" controls and not html <input tags
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