Solved

combo box selected value

Posted on 2006-07-21
5
314 Views
Last Modified: 2010-04-23
Hi, there,

I have this code that will get the selected value from the combo and put in the parameter.  The If statement will causes NullRefernceException ("obj ref not set to an instance of an obj") IF I typed a value which matchs one of the listed value, however, when I selected the value by mouse/keystroke, the code works fine. How can I change my if line to accomandate that goal?

            arParms(0) = New SqlParameter("@P1_CSR", SqlDbType.Int)
            If CType(cboCSR.SelectedItem, System.Data.DataRowView).Row("CSR").ToString = "" Then
                arParms(0).Value = DBNull.Value
            Else
                arParms(0).Value = cboCSR.SelectedValue
            End If
And here is how the combo got populated. By the way, the first row of the returned data are Null, Null.

            dsOptions = SqlHelper.ExecuteDataset(cn_str_QWright_Dev, CommandType.StoredProcedure, "CT_getCSR")
            dsOptions.Tables(0).TableName = "CSR"
            cboCSR.DataSource = dsOptions.Tables("CSR")
            cboCSR.DisplayMember = "CSR"
            cboCSR.ValueMember = "EmployeeID"

Thanks in advance!
0
Comment
Question by:ommer
  • 2
5 Comments
 
LVL 6

Expert Comment

by:manch
ID: 17158962
In such case u can use the Text property of the combo box or the SelectedIndex property of the compbo box

e.g. ( Replace ur if statement with )

If Trim(cboCSR.Text) = ""  Then
         arParms(0).Value = DBNull.Value
Else
        arParms(0).Value = cboCSR.Text
End If
0
 

Author Comment

by:ommer
ID: 17167863
Manch,

Thank you for your reply.

I need to account for both typing in value and selecting from the list. My original code could handle the selecting from list part.

Using your code to take care of the other half, I run into data type problem..

The parameter has to have a data type of Int. I guest I need a way to loop through my cbo.Items to find the one that eqauls to the typed in value, and make it the selected one.





0
 

Author Comment

by:ommer
ID: 17168151

Here is the one I got it to work. It turned out there is this FindString function I can use. The code block is little too messy than it needs to be.

            If Trim(cboCSR.Text) = "" Then
                If CType(cboCSR.SelectedItem, System.Data.DataRowView).Row("CSR").ToString = "" 
                    arParms(0).Value = DBNull.Value
                Else
                    arParms(0).Value = cboCSR.SelectedValue
                End If
            Else
                cboCSR.SelectedIndex = cboCSR.FindString(cboCSR.Text)
                arParms(0).Value = cboCSR.SelectedValue
            End If
0
 
LVL 1

Accepted Solution

by:
GhostMod earned 0 total points
ID: 17206132
Closed, 125 points refunded.

GhostMod
Community Support Moderator
0

Featured Post

ScreenConnect 6.0 Free Trial

Want empowering updates? You're in the right place! Discover new features in ScreenConnect 6.0, based on partner feedback, to keep you business operating smoothly and optimally (the way it should be). Explore all of the extras and enhancements for yourself!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Get hold of longitude and latitude in iframe string 11 46
VB.Net Report Printing Issue 3 33
get row value in vb.net 4 14
Footer for each row on Gridview 2 21
This tutorial demonstrates one way to create an application that runs without any Forms but still has a GUI presence via an Icon in the System Tray. The magic lies in Inheriting from the ApplicationContext Class and passing that to Application.Ru…
Introduction As chip makers focus on adding processor cores over increasing clock speed, developers need to utilize the features of modern CPUs.  One of the ways we can do this is by implementing parallel algorithms in our software.   One recent…
Established in 1997, Technology Architects has become one of the most reputable technology solutions companies in the country. TA have been providing businesses with cost effective state-of-the-art solutions and unparalleled service that is designed…
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…

773 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question