I have bind a dataset, DentistDataSet1 , to TextBox, txtLastName, by set the
textbox property (databindings--> simple binding--> ... -->LastName) and also
bind it to a dropdown list, DropdownList1 with datasource (DentistDataSet 1),
DataMember (Dentists), and DataTextField (DentistID), and AutoPostBack(tr ue).
The settings are done by Visual .NET studio 2003.
Also I have the following event code and expect the FirstName and LastName
would be changed with selecting another DentistID in the dropdown list.
-------
Private Sub DropDownList1_S electedIndexCha nged(ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
DropDownList1.S electedIndexCha nged
txtLastName.Tex t =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "LastName")
txtFirstName.Te xt =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "FirstName" )
End Sub
------
When I select a new DentistID, I got the following error:
------
Exception Details: System.IndexOut OfRangeExceptio n: There is no row at
position 1.
Source Error:
Line 182: 'txtLastName.Da taBind()
Line 183: 'txtFirstName.D ataBind()
Line 184: txtLastName.Tex t =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "LastName")
Line 185: txtFirstName.Te xt =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "FirstName" )
Line 186:
------
Any one could help me to figure out the problem? Or what is the correct
steps to set up the properties and coding to get my expected result?
Thank you very much
David
3  1726 
You have to refill your dataset on postback...it doesn't magically preserve
its values...
Karl
--
MY ASP.Net tutorials http://www.openmymind.net/ - New and Improved (yes, the popup is annoying) http://www.openmymind.net/faq.aspx - unofficial newsgroup FAQ (more to
come!)
"david" <da***@discussi ons.microsoft.c om> wrote in message
news:57******** *************** ***********@mic rosoft.com... I have bind a dataset, DentistDataSet1 , to TextBox, txtLastName, by set
the textbox property (databindings--> simple binding--> ... -->LastName) and
also bind it to a dropdown list, DropdownList1 with datasource
(DentistDataSet 1), DataMember (Dentists), and DataTextField (DentistID), and
AutoPostBack(tr ue). The settings are done by Visual .NET studio 2003.
Also I have the following event code and expect the FirstName and LastName
would be changed with selecting another DentistID in the dropdown list.
-------
Private Sub DropDownList1_S electedIndexCha nged(ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
DropDownList1.S electedIndexCha nged
txtLastName.Tex t =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "LastName")
txtFirstName.Te xt =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "FirstName" )
End Sub
------
When I select a new DentistID, I got the following error:
------
Exception Details: System.IndexOut OfRangeExceptio n: There is no row at
position 1.
Source Error:
Line 182: 'txtLastName.Da taBind()
Line 183: 'txtFirstName.D ataBind()
Line 184: txtLastName.Tex t =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "LastName")
Line 185: txtFirstName.Te xt =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "FirstName" )
Line 186:
------
Any one could help me to figure out the problem? Or what is the correct
steps to set up the properties and coding to get my expected result?
Thank you very much
David
Thank you, Karl:
I have added code to Page_load as follows, but I still got error.
-----------------
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles MyBase.Load
'Put user code to initialize the page here
If Not Page.IsPostBack Then
SqlDataAdapter1 .Fill(DentistDa taSet1)
DropDownList1.D ataBind()
txtLastName.Dat aBind()
txtFirstName.Da taBind()
txtLastName.Tex t =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "LastName")
txtFirstName.Te xt =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "FirstName" )
End If
SqlDataAdapter1 .Fill(DentistDa taSet1)
'DropDownList1. DataBind()
txtLastName.Tex t =
CStr(DentistDat aSet1.Tables(0) .Rows(CInt(lblC urrentIndex.Tex t))("LastName") )
txtFirstName.Te xt =
CStr(DentistDat aSet1.Tables(0) .Rows(CInt(lblC urrentIndex.Tex t))("FirstName" ))
End Sub
----------------------
Exception Details: System.FormatEx ception: Input string was not in a correct
format.
Source Error:
Line 178: SqlDataAdapter1 .Fill(DentistDa taSet1)
Line 179: 'DropDownList1. DataBind()
Line 180: txtLastName.Tex t =
CStr(DentistDat aSet1.Tables(0) .Rows(CInt(lblC urrentIndex.Tex t))("LastName") )
Line 181: txtFirstName.Te xt =
CStr(DentistDat aSet1.Tables(0) .Rows(CInt(lblC urrentIndex.Tex t))("FirstName" ))
Line 182:
-------------------------
"Karl Seguin" wrote: You have to refill your dataset on postback...it doesn't magically preserve
its values...
Karl
--
MY ASP.Net tutorials
http://www.openmymind.net/ - New and Improved (yes, the popup is annoying)
http://www.openmymind.net/faq.aspx - unofficial newsgroup FAQ (more to
come!)
"david" <da***@discussi ons.microsoft.c om> wrote in message
news:57******** *************** ***********@mic rosoft.com... I have bind a dataset, DentistDataSet1 , to TextBox, txtLastName, by set
the textbox property (databindings--> simple binding--> ... -->LastName) and
also bind it to a dropdown list, DropdownList1 with datasource
(DentistDataSet 1), DataMember (Dentists), and DataTextField (DentistID), and
AutoPostBack(tr ue). The settings are done by Visual .NET studio 2003.
Also I have the following event code and expect the FirstName and LastName
would be changed with selecting another DentistID in the dropdown list.
-------
Private Sub DropDownList1_S electedIndexCha nged(ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
DropDownList1.S electedIndexCha nged
txtLastName.Tex t =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "LastName")
txtFirstName.Te xt =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "FirstName" )
End Sub
------
When I select a new DentistID, I got the following error:
------
Exception Details: System.IndexOut OfRangeExceptio n: There is no row at
position 1.
Source Error:
Line 182: 'txtLastName.Da taBind()
Line 183: 'txtFirstName.D ataBind()
Line 184: txtLastName.Tex t =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "LastName")
Line 185: txtFirstName.Te xt =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "FirstName" )
Line 186:
------
Any one could help me to figure out the problem? Or what is the correct
steps to set up the properties and coding to get my expected result?
Thank you very much
David
My guess is that lblCurrentIndex .Text isn't an int like you think it is...
Karl
--
MY ASP.Net tutorials http://www.openmymind.net/ - New and Improved (yes, the popup is annoying) http://www.openmymind.net/faq.aspx - unofficial newsgroup FAQ (more to
come!)
"david" <da***@discussi ons.microsoft.c om> wrote in message
news:87******** *************** ***********@mic rosoft.com... Thank you, Karl:
I have added code to Page_load as follows, but I still got error.
-----------------
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArg s) Handles MyBase.Load
'Put user code to initialize the page here
If Not Page.IsPostBack Then
SqlDataAdapter1 .Fill(DentistDa taSet1)
DropDownList1.D ataBind()
txtLastName.Dat aBind()
txtFirstName.Da taBind()
txtLastName.Tex t =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "LastName")
txtFirstName.Te xt =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "FirstName" )
End If
SqlDataAdapter1 .Fill(DentistDa taSet1)
'DropDownList1. DataBind()
txtLastName.Tex t =
CStr(DentistDat aSet1.Tables(0) .Rows(CInt(lblC urrentIndex.Tex t))("LastName") ) txtFirstName.Te xt =
CStr(DentistDat aSet1.Tables(0) .Rows(CInt(lblC urrentIndex.Tex t))("FirstName" )
)
End Sub
----------------------
Exception Details: System.FormatEx ception: Input string was not in a
correct format.
Source Error:
Line 178: SqlDataAdapter1 .Fill(DentistDa taSet1)
Line 179: 'DropDownList1. DataBind()
Line 180: txtLastName.Tex t =
CStr(DentistDat aSet1.Tables(0) .Rows(CInt(lblC urrentIndex.Tex t))("LastName") ) Line 181: txtFirstName.Te xt =
CStr(DentistDat aSet1.Tables(0) .Rows(CInt(lblC urrentIndex.Tex t))("FirstName" )
) Line 182:
-------------------------
"Karl Seguin" wrote:
You have to refill your dataset on postback...it doesn't magically
preserve its values...
Karl
--
MY ASP.Net tutorials
http://www.openmymind.net/ - New and Improved (yes, the popup is
annoying) http://www.openmymind.net/faq.aspx - unofficial newsgroup FAQ (more to
come!)
"david" <da***@discussi ons.microsoft.c om> wrote in message
news:57******** *************** ***********@mic rosoft.com... I have bind a dataset, DentistDataSet1 , to TextBox, txtLastName, by
set the textbox property (databindings--> simple binding--> ... -->LastName)
and also bind it to a dropdown list, DropdownList1 with datasource
(DentistDataSet 1), DataMember (Dentists), and DataTextField (DentistID), and
AutoPostBack(tr ue). The settings are done by Visual .NET studio 2003.
Also I have the following event code and expect the FirstName and
LastName would be changed with selecting another DentistID in the dropdown
list. -------
Private Sub DropDownList1_S electedIndexCha nged(ByVal sender As
System.Object, ByVal e As System.EventArg s) Handles
DropDownList1.S electedIndexCha nged
txtLastName.Tex t =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "LastName") txtFirstName.Te xt =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "FirstName" )
End Sub
------
When I select a new DentistID, I got the following error:
------
Exception Details: System.IndexOut OfRangeExceptio n: There is no row at
position 1.
Source Error:
Line 182: 'txtLastName.Da taBind()
Line 183: 'txtFirstName.D ataBind()
Line 184: txtLastName.Tex t =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "LastName") Line 185: txtFirstName.Te xt =
DentistDataSet1 .Tables(0).Rows (DropDownList1. SelectedIndex)( "FirstName" ) Line 186:
------
Any one could help me to figure out the problem? Or what is the
correct steps to set up the properties and coding to get my expected result?
Thank you very much
David
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