Windows Forms

Re: datagridviewtextboxcell error on 350 characters

12-Nov-14 21:26

Where does the error occur?

Please edit your question and put <pre> tags around your code so it looks like:

Processor.Data.WebsitePageDownload.RejectChanges()
AddHandler maintenanceDataGridView.RowValidated, AddressOf maintenanceDataGridView_RowValidated

and indicate exactly which line the error occurs on.

Rhyde Marsh13-Nov-14 3:39

Re: datagridviewtextboxcell error on 350 characters

13-Nov-14 3:39

Thanks for your response. The error occur on the acceptchanges line

Private Sub m_maintenanceProcessor_WebsiteUpdated(ByVal sender As Object, ByVal e As Processors.EventArgs) Handles m_maintenanceProcessor.WebsiteUpdated
          Dim tempTable As MaintenanceDataSet.WebsitePageDownloadDataTable

          Try
              If e.Data.Contains("ModifiedRows") = False Then Exit Sub
              tempTable = CType(e.Data("ModifiedRows"), MaintenanceDataSet.WebsitePageDownloadDataTable)
              If tempTable.Rows.Count > 0 Then
                  RemoveHandler maintenanceDataGridView.RowValidated, AddressOf maintenanceDataGridView_RowValidated
                  Processor.Data.WebsitePageDownload.LoadingTable = True
                  Processor.Data.WebsitePageDownload.Merge(tempTable, False)
                  Processor.Data.WebsitePageDownload.LoadingTable = False
                  Processor.Data.WebsitePageDownload.RejectChanges()
                  AddHandler maintenanceDataGridView.RowValidated, AddressOf maintenanceDataGridView_RowValidated


                  Processor.Data.WebsitePageDownload.Merge(tempTable)

                  'For Each row As DataRow In tempTable.Rows
                  '    If row.RowError IsNot Nothing AndAlso row.RowError.Length > 0 Then
                  '        MsgBox(row.RowError)
                  '    End If

                  '    ' MsgBox(row("URL").ToString)

                  'Next

                  'MsgBox(Processor.Data.WebsitePageDownload.Columns("defaultstatusid").MaxLength)
                  Processor.Data.WebsitePageDownload.AcceptChanges()
              End If
          Catch ex As Exception
              MsgBox(ex.Message.ToString)
          End Try
          tempTable = Nothing

          Me.StatusMessage = String.Empty

      End Sub

Richard MacCutchan13-Nov-14 4:26

Re: datagridviewtextboxcell error on 350 characters

13-Nov-14 4:26

You will need to use your debugger to find out which reference in that line is invalid.

Rhyde Marsh13-Nov-14 5:25

Re: datagridviewtextboxcell error on 350 characters

13-Nov-14 5:25

what i know for a fact is the is a field that is set for 2000 characters but once this field goes over 350 the error gets triggered, other than that the application is fine

Richard MacCutchan13-Nov-14 5:38

Re: datagridviewtextboxcell error on 350 characters

13-Nov-14 5:38

Rhyde Marsh wrote:
what i know for a fact

But that is hardly relevant. Somewhere in your application something is being triggered which causes a null reference to be used. The only way to discover where that is and why, is to do some detailed debugging.

Rhyde Marsh14-Nov-14 1:27

Re: datagridviewtextboxcell error on 350 characters

14-Nov-14 1:27

ok i will get to that. juss that i have been looking and and dont see where

Eddy Vluggen13-Nov-14 5:38

Re: datagridviewtextboxcell error on 350 characters

13-Nov-14 5:38

2000 characters? In which encoding? UTF16?

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Rhyde Marsh18-Nov-14 5:36

Re: datagridviewtextboxcell error on 350 characters

18-Nov-14 5:36

sorry for the late response but data field is set to nvarchar 2000
and the MaxInputLength set at 2000

Eddy Vluggen18-Nov-14 5:50

Re: datagridviewtextboxcell error on 350 characters

18-Nov-14 5:50

Rhyde Marsh wrote:
nvarchar

Good.

Check the line

Processor.Data.WebsitePageDownload.AcceptChanges()

Set the cursor on the AcceptChanges method, hit F12. Set breakpoints there, and make sure that the method does not swallow the changes.

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Rhyde Marsh18-Nov-14 8:33

Re: datagridviewtextboxcell error on 350 characters

18-Nov-14 8:33

not sure what you mean swallow, but the data is updated but there seems to be a problem when it returns to the UI

Eddy Vluggen18-Nov-14 10:23

Re: datagridviewtextboxcell error on 350 characters

18-Nov-14 10:23

Rhyde Marsh wrote:
not sure what you mean swallow,

I'm expecting a try-catch in that method that hides the exception that is thrown.

Rhyde Marsh wrote:
the data is updated but there seems to be a problem when it returns to the UI

Is the data updated beyond the 350-char mark? How do you know there's a problem? Do you have an exception and a stack-trace?

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Rhyde Marsh19-Nov-14 3:11

Re: datagridviewtextboxcell error on 350 characters

19-Nov-14 3:11

yes it updates but then i get a nullrefference exception. so before the 350 mark it updates and refresh fine but anything after that i get the error

Eddy Vluggen19-Nov-14 5:15

Re: datagridviewtextboxcell error on 350 characters

19-Nov-14 5:15

Rhyde Marsh wrote:
nullrefference exception

I assumed that was fixed, based on your previous post.

Can you post the entire stacktrace from the exception?

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Rhyde Marsh21-Nov-14 11:19

Re: datagridviewtextboxcell error on 350 characters

21-Nov-14 11:19

no my problem was not solved, but i it seem to be on bug on microsoft side in the control

s at System.Windows.Forms.DataGridView.ComputeVisibleColumns()
at System.Windows.Forms.DataGridView.LayoutScrollBars()
at System.Windows.Forms.DataGridView.ComputeLayout()
at System.Windows.Forms.DataGridView.PerformLayoutPrivate(Boolean useRowShortcut, Boolean computeVisibleRows, Boolean invalidInAdjustFillingColumns, Boolean repositionEditingControl)
at System.Windows.Forms.DataGridView.ResetUIState(Boolean useRowShortcut, Boolean computeVisibleRows)
at System.Windows.Forms.DataGridViewRowCollection.OnCollectionChanged_PreNotification(CollectionChangeAction cca, Int32 rowIndex, Int32 rowCount, DataGridViewRow& dataGridViewRow, Boolean changeIsInsertion)
at System.Windows.Forms.DataGridViewRowCollection.OnCollectionChanged(CollectionChangeEventArgs e, Int32 rowIndex, Int32 rowCount, Boolean changeIsDeletion, Boolean changeIsInsertion, Boolean recreateNewRow, Point newCurrentCell)
at System.Windows.Forms.DataGridViewRowCollection.ClearInternal(Boolean recreateNewRow)
at System.Windows.Forms.DataGridView.RefreshRows(Boolean scrollIntoView)
at System.Windows.Forms.DataGridView.DataGridViewDataConnection.ProcessListChanged(ListChangedEventArgs e)
at System.Windows.Forms.DataGridView.DataGridViewDataConnection.currencyManager_ListChanged(Object sender, ListChangedEventArgs e)
at System.Windows.Forms.CurrencyManager.OnListChanged(ListChangedEventArgs e)
at System.Windows.Forms.CurrencyManager.List_ListChanged(Object sender, ListChangedEventArgs e)
at System.Data.DataView.OnListChanged(ListChangedEventArgs e)
at System.Data.Listeners`1.Notify[T1,T2,T3](T1 arg1, T2 arg2, T3 arg3, Action`4 action)
at System.Data.Index.OnListChanged(ListChangedEventArgs e)
at System.Data.DataTable.ResetInternalIndexes(DataColumn column)
at System.Data.DataTable.Clear(Boolean clearAll)
at MCAP.MaintenanceDataSetTableAdapters.WebsitePageDownloadTableAdapter.FillByWhereClause(WebsitePageDownloadDataTable dataTable, String whereClause) in C:\Users\mmarshall.MTMOBAY\Desktop\Mark\MCAP\DataSet\MaintenanceDataSet.Designer.vb:line 35940
at MCAP.UI.Processors.Maintenance.LoadFilteredWebsite(String filterCondition) in C:\Users\mmarshall.MTMOBAY\Desktop\Mark\MCAP\UIProcess\Maintenance.vb:line 6328

i found similar issue on microsoft site

https://social.msdn.microsoft.com/Forums/ro-RO/bdbd2524-a07a-4deb-bbd4-d937fdd691c4/systemnullreferenceexception-when-clicking-column-header?forum=winformsdatacontrols[^]

Eddy Vluggen22-Nov-14 3:55

Re: datagridviewtextboxcell error on 350 characters

22-Nov-14 3:55

That could be tested easily by giving the columns a fixed width Smile | :)

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If you can't read my code, try converting it here[^]

Rhyde Marsh24-Nov-14 2:36

Re: datagridviewtextboxcell error on 350 characters

24-Nov-14 2:36

yes, but cannot be limited because the length of the url entered is unknown

Eddy Vluggen24-Nov-14 3:38

Re: datagridviewtextboxcell error on 350 characters

24-Nov-14 3:38

This is not helping much, we're talking about different things.

If you can fix the size of the column in the grid in where it is displayed to 100 pixels, then you can still enter long strings. It would prove whether or not the observed behaviour is caused by the internal resizing, or somewhere else.

If fixing the width helps, then you'll need to look for other alternatives or find a fix. If fixing the width does not help, then the error is occurring somewhere else.

Bastard Programmer from Hell Suspicious | :suss:

If you can't read my code, try converting it here[^]

Rhyde Marsh10-Dec-14 3:44

Chart Control Legend Item Ordering

10-Dec-14 3:44

had to change the column to accomodate a popup wasnt getting anywhere with it

Member 998046316-Oct-14 2:40

Member 9980463

16-Oct-14 2:40

Hi everybody!

I hope I am posting this question on the correct forum but anyway, I'm having some difficulty getting a Legend on a Chart Control to behave in the way I would like it to.

I want the legend to be placed under the chart, and legend items for each series to be added to the legend in the order the series are added to the chart.

Say I have 6 series which are added to the chart in order: A, B, C, D, E, F.

Suppose that the chart area in which the legend is docked is such a size that the legend has 3 columns.

I want the legend to be filled like so:

A B C
D E F

i.e. columns first, then rows.

Frustratingly, this is not the behaviour I am getting.

As I add the first three series all is fine, and I get a legend with 3 columns and 1 row filled like so:

A B C

But when I add a 4th series, instead of getting:

A B C
D

as one might expect, the legend looks like this:

A C D
B

Then when I add the next series I get:

A C E
B D

And when I add the final series I get:

A C E
B D F

This is really frustrating me as I have trawled the internet and cannot find any mention of this issue, let alone an answer. Surely wanting the legend to be filled columns first, then rows, would be the most logical way of doing it, so I can't believe that the .NET guys haven't allowed for this possibility.

Anyway, my legend is set with the following properties:

Legend legend = new Legend("Legend1");
legend.LegendItemOrder = LegendItemOrder.ReversedSeriesOrder;
legend.Alignment = StringAlignment.Center;
legend.Docking = Docking.Bottom;
legend.LegendStyle = LegendStyle.Table;
legend.TableStyle = LegendTableStyle.Wide;
legend.IsEquallySpacedItems = true;
legend.AutoFitMinFontSize = 6;
legend.IsTextAutoFit = true;
chart.Legends.Add(legend);

Can anyone please help me?

Thanks, Nick

Re: Chart Control Legend Item Ordering

jkirkerx17-Nov-14 13:38

jkirkerx

17-Nov-14 13:38

I'm sure you have searched plenty

http://stackoverflow.com/questions/1917798/ms-chart-control-change-the-order-of-series-in-a-legend[^]

I don't know the complexity of your chart, but I do know that the order in which you load the series to the chart is important, and what type of chart you select as well such as a series chart with plot lines.

I guess take a pie chart, now you have a legend to explain the pieces of the pie, there really is no order to it. Unless the largest pieces of the pie down to the smallest are the order.

I've always had to experiment for hours to get them right, and after 100's of them, narrow down which charts to stay away from.

I'm not sure if you can do multiple legends, and display them in rows or columns.

Not the answer you want, but your going have to take to pencil and paper and record your results based on what you get, or try the Microsoft Forum for Chart Control at asp.net

infragistics numeric editor+ alllow user to input the value max

srinandan..16-Sep-14 21:00

srinandan..

16-Sep-14 21:00

Hi all,
I am very new to windows form and facing a problem with infragistics numeric editor. I need to allow user to input the value max "100.00%" or below (like 45.78, 99.00, 99.99). I am setting following propety for this:

MaskDisplayMode =IncludeBoth
MastInput= {LOC}nn.nn%
MaxValue= 100
MinValue = 0

It allows user to input 100.99% but i need to restrict so that user cann't input more than 100.00

Help really appreciated.

Thanks,
Sri

modified 17-Sep-14 3:19am.

Re: infragistics numeric editor+ alllow user to input the value max

Eddy Vluggen19-Sep-14 8:19

search or filter treenode display based on text input from user

19-Sep-14 8:19

srinandan.. wrote:
Help really appreciated.

Ask the infragistics support team. It's not a generic control, not part of the framework.

srinandan.. wrote:
It allows user to input 100.99%

Sounds like a bug where one only checks the integer-part for the max, not the decimal.

You could easily do this without infragistics; there's quite some material out there on "validation".

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Member 110597994-Sep-14 13:27

Member 11059799

4-Sep-14 13:27

New to VS C# and inherited a partially developed C# Winform project. Need some guidance.

Windows Form displays SQL results in a tree view with the intent of the user selecting item(s) from the list. You have to scroll the list and find item(s) you want to select.

Items have a # and a name and most users know one or the other.

Question: Is there a way to include a text box or something that would move the tree display to characters typed in the box? If yes how is it done in VS C#?

Anyone have a sample project I could download? Doesn't have to be SQL data, could be a windows directory or something.

Re: search or filter treenode display based on text input from user

Richard MacCutchan4-Sep-14 21:17