Question

DataBinding: 'System.String' does not contain a property with the name

Asked by: nanditab10

I am getting the error below :

when trying to bind the listbox with the Arraylist..  on this line :
Me.lstMPIN.DataBind()

DataBinding: 'System.String' does not contain a property with the name 'MPIN'.

The listbox  is initially populated with the code below on page load
 Me.SqlDataSourceUserList.ConnectionString = ConfigurationManager.ConnectionStrings("PPMConnectionString").ConnectionString
        Me.SqlDataSourceUserList.SelectCommand = "SELECT distinct [Srvc_Mpin] as MPIN FROM  " & varPrepTblname & " where SRC_SYS_GRP_RLLP_DESC in ('UNET','MAMSI','RV','RIMS','OHP','NICE','ILIAD','LIVE') order by [Srvc_Mpin] "
        lstMPIN.DataSource = Me.SqlDataSourceUserList
        lstMPIN.DataTextField = "MPIN"


And then later on  I read the content of the listbox in a arraylist.. and need to repopulate the listbox with that arraylist .. the reason I am doing is I need to use the sort feature of the array..

        Dim alItems_MPIN As New ArrayList()
        For Each lst As ListItem In Me.lstMPIN.Items
            alItems_MPIN.Add(lst.Text)
        Next
        alItems_MPIN.Sort()

        lstMPIN.DataSource = ""

        Me.lstMPIN.DataSource = alItems_MPIN
        Me.lstMPIN.DataTextField = "MPIN"
        Me.lstMPIN.DataBind()

any help Please ?

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Asked On
2009-10-30 at 14:21:48ID24859749
Tags

ASP.net

,

vb.net

Topics

Microsoft Applications

,

Microsoft Development

,

Programming for ASP.NET

Participating Experts
1
Points
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Comments
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Answers

 

by: Omego2KPosted on 2009-10-30 at 16:05:10ID: 25707336

instead of:
Me.lstMPIN.DataSource = alItems_MPIN
        Me.lstMPIN.DataTextField = "MPIN"
        Me.lstMPIN.DataBind()
use this:
Me.lstMPIN.DataSource = alItems_MPIN
Me.lstMPIN.DataBind()

 

by: nanditab10Posted on 2009-10-30 at 16:54:32ID: 25707571

Hi Omego2k,

I had tried that before and tried it again but had no luck with it.

I still get the error at the same line
Me.lstMPIN.DataBind()

DataBinding: 'System.String' does not contain a property with the name 'MPIN'.



 

by: Omego2KPosted on 2009-10-30 at 17:39:29ID: 25707772

I'm afraid you must be mistaken. If you do it the way I stated:
Me.lstMPIN.DataSource = alItems_MPIN
Me.lstMPIN.DataBind()

You cannot receive the exception:
DataBinding: 'System.String' does not contain a property with the name 'MPIN'.

Please check your code and try again. :)

 

by: nanditab10Posted on 2009-10-30 at 17:49:10ID: 25707816

No , i rechecked and its still the same issue..   If i remove my first set of code that populates the listbox on page load initially and instead of that I hardcode the values : then the arraylist code works without any issue.

The listbox  is initially populated with the code below on page load

  Me.SqlDataSourceUserList.ConnectionString = ConfigurationManager.ConnectionStrings("PPMConnectionString").ConnectionString
        Me.SqlDataSourceUserList.SelectCommand = "SELECT distinct [Srvc_Mpin] as MPIN FROM  " & varPrepTblname & " where SRC_SYS_GRP_RLLP_DESC in ('UNET','MAMSI','RV','RIMS','OHP','NICE','ILIAD','LIVE') order by [Srvc_Mpin] "
        lstMPIN.DataSource = Me.SqlDataSourceUserList
        lstMPIN.DataTextField = "MPIN"
        lstMPIN.DataValueField = "MPIN"
        lstMPIN.DataBind()

_________________________

 

by: Omego2KPosted on 2009-10-30 at 18:01:43ID: 25707863

Im afraid the code I gave you does not result in the same exception. Please recheck it.

I thought that you wanted to bind it to an arrayList?

 

by: nanditab10Posted on 2009-10-30 at 18:23:06ID: 25707923

here is what i am trying to do :
the listbox is initially populated with this code here on page load.
 Me.SqlDataSourceUserList.ConnectionString = ConfigurationManager.ConnectionStrings("PPMConnectionString").ConnectionString
        Me.SqlDataSourceUserList.SelectCommand = "SELECT distinct [Srvc_Mpin] as MPIN FROM  " & varPrepTblname & " where SRC_SYS_GRP_RLLP_DESC in ('UNET','MAMSI','RV','RIMS','OHP','NICE','ILIAD','LIVE') order by [Srvc_Mpin] "
        lstMPIN.DataSource = Me.SqlDataSourceUserList
        lstMPIN.DataTextField = "MPIN"
        lstMPIN.DataValueField = "MPIN"
        lstMPIN.DataBind()

2) The value on the list box can change based on user selection:  so I am reading all the available value in the listbox into Arraylist.. sorting it and putting it back in the Listbox. that is binding the arraylist back to Listbox.

I am getting the error while trying to bind it to the listbox.
__________
Now based on my trial , what i found was that If i dont do the first part ..populate the listbox with the way I am doing on page load . ..if for test purpose i just hardcode some value and try.. the second set of code of binding the arraylist works just fine.

any suggestion ?



 

by: Omego2KPosted on 2009-10-30 at 18:46:30ID: 25707988

The only thing I could think to suggest more is this:
Me.lstMPIN.DataSource = alItems_MPIN
        Me.lstMPIN.DataTextField = Nothing
        Me.lstMPIN.DataBind()

 

by: nanditab10Posted on 2009-10-30 at 19:01:02ID: 25708038

wow.....adding  one more line ..did the trick  Thanks so much..

 Me.lstMPIN.DataValueField = Nothing

20120131-EE-VQP-002

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