Question Comments

It's so good example.

Thank you so much !!!

[ASPX]

<dx:ASPxGridView ID="grid" ClientInstanceName="grid" ....
KeyFieldName="MST_CD" OnCellEditorInitialize="grid_CellEditorInitialize">

<dx:ASPxGridView ID="gridDetail" ClientInstanceName="gridDetail" ....
KeyFieldName="MST_CD;CD" OnCellEditorInitialize="grid_CellEditorInitialize">

[C#]
   protected DataTable dtGrid = null;
   protected DataTable dtGridDetail = null;

   protected void Page_Load(object sender, EventArgs e)
   {
       if (! Page.IsPostBack)
       {
               //GET DATATABLE
               dtGrid = dataset.Tables[0];
               //SET PRIMARY KEY(S)
               dtGrid.PrimaryKey = new DataColumn[] { dtGrid.Columns["MST_CD"] };
               //SET SESSION
               Session["DataSet"] = dtGrid;

               dtGridDetail = dataset2.Tables[0];
               dtGridDetail .PrimaryKey = new DataColumn[] { dtGrid.Columns["MST_CD;CD"] };
               Session["DataSetDetail"] = dtGridDetail ;
       }
       else
       {
           dtGrid = (DataTable)Session["DataSet"];
           dtGridDetail = (DataTable)Session["DataSetDetail"];
       }

       grid.DataSource = dtGrid;
       grid.DataBind();

       gridDetail.DataSource = dtGridDetail;
       gridDetail.DataBind();
   }

   /// <summary>
   /// Prevent Editing of the Key Column(s) on Cell Updating
   /// </summary>
   /// <param name="sender"></param>
   /// <param name="e"></param>
   protected void grid_CellEditorInitialize(object sender, ASPxGridViewEditorEventArgs e)
   {
       ASPxGridView oGrid = sender as ASPxGridView;

       string sSession = string.Empty;

       if ("grid" == oGrid.ClientInstanceName )
       {
           sSession = "DataSet";
       }
       else if ("gridDetail" == oGrid.ClientInstanceName)
       {
           sSession = "DataSetDetail";
       }

       DataTable oDt = (DataTable)Session[sSession];
       
       for (int i = 0; i < oDt.PrimaryKey.Length; i++)
       {
           if (e.Column.FieldName == oDt.PrimaryKey[i].ColumnName)
           {
               e.Editor.ReadOnly = !oGrid.IsNewRowEditing;
               return;
           }
       }
   }

Hi! I am using Batch Edit mode but CellEditorInitialize event will not fired when clicking New button, any other method can do this scenario else? Thanks!

Hello,

To process your recent post more efficiently, I created a separate ticket on your behalf: T237217: ASPxGridView - Batch Editing - The CellEditorInitialize event will not fired when clicking New button. This ticket is currently in our processing queue. Our team will address it as soon as we have any updates.

[C#]
settings.CellEditorInitialize=(s,e)=>{ASPxGridViewgrid=sasASPxGridView;ASPxEditeditor=(ASPxEdit)e.Editor;if(e.Column.FieldName=="columnName1"||e.Column.FieldName=="columnName2"){e.Editor.ReadOnly=!grid.IsNewRowEditing;}};

Hello Ravi, 

Since your last post is related to ASP.NET MVC, I've created a separate ticket on your behalf (T386483: GridView - How to apply an approach from the E5116 example to edit columns when a new row is being created). It has been placed in our processing queue and will be answered shortly.

Hello,

I've created a separate ticket on your behalf (T533092: ASPxGridView - How to hide some field editors when editing a row and allow their editing when adding a new row). It has been placed in our processing queue and will be answered shortly.

Question Comments

How to find a control inside contentIFrameWindow?
clientTbContent it's a dinamic control and generates runtime. I have the ID of the control:
"RFCX1"
Obviously this is incorrect: contentIFrameWindow."RFCX1". Does exist a method of contentIFrameWindow to get the control from ID?
I already try getElementById but still not working.

Hello,

To process your recent post more efficiently, I created a separate ticket on your behalf: T251888: ASPxSplitter - How to find a control inside contentIFrameWindow. This ticket is currently in our processing queue. Our team will address it as soon as we have any updates.

Question Comments

I was just trying to use some of this code, but the SetButtonsVisibility function does not get a value for var statusBar because there are no elements on the rendered page with class name "StatusBarWithButtons" (did a view source and string search). Has this changed recently?

It seems that you have created a separate ticket for this issue. Let's continue discussing this issue in the ASPxGridView batch edit confirmation on save thread.

One more thing, though - do you have any examples, or could point me to some pertinent doc, on how to construct the following piece of the ASPxGridView specs in code? I am building the entire ASPxGridView in code dynamically, and I can figure out everything else except the following:

           <Templates>
               <StatusBar>
                   <div style="text-align: right">
                       <dx:ASPxHyperLink ID="hlSave" runat="server" Text="Save changes">
                           <ClientSideEvents Click="function(s, e){ gridView.UpdateEdit(); }" />
                       </dx:ASPxHyperLink>
                       <dx:ASPxHyperLink ID="hlCancel" runat="server" Text="Cancel changes">
                           <ClientSideEvents Click="function(s, e){ gridView.CancelEdit(); SetButtonsVisibility(gridView); }" />
                       </dx:ASPxHyperLink>
                   </div>
               </StatusBar>
           </Templates>

Hello,

To process your recent post more efficiently, I created a separate ticket on your behalf: T231731: ASPxGridView - How to create the StatusBar template dynamically. This ticket is currently in our processing queue. Our team will address it as soon as we have any updates.

Hi Gabriel,

I'm happy to inform you that this functionality will be available out of the box with our next major release (see ASPxGridView, ASPxCardView - Change Save and Cancel buttons' enabled state when an end-user changes a value in BatchEdit mode). 

Question Comments

Is this still the method I should follow for the latest version of the winforms gridcontrol?

Hello Joe,
Yes, use this example to implement the copy/paste feature.

Dear,

i need to do this with all my gridviews with datasource XPCOLLECTION, what do i have to do ?
Thanks for your support!

Hello,

To process your recent post more efficiently, I created a separate ticket on your behalf: T273510: How to implement the Copy/Paste feature with XPCollection in a grid. This ticket is currently in our processing queue. Our team will address it as soon as we have any updates.

Hi, support team!

1) Some of my columns are binded to another tables in a datasource with lookup edit, where it gets its values. While copying and pasting a row, there is a FormatException, because columns valuemember is int, display member is string. How can it be solved?

2) It also throws exception ArgumentException, when pasting empty cell of type DateTime. It is not leaving empty Datetime cell as empty in pasted row, says "String was not recognized as a valid Datetime.."

Thank you very much!

Hello,

To process your recent post more efficiently, I created a separate ticket on your behalf: While copying and pasting a row, there is a FormatException, because columns valuemember is int, display member is string. This ticket is currently in our processing queue. Our team will address it as soon as we have any updates.

Question Comments

I copied this example for reordering the element of a list bound to the control and it works almost perfectly. The problem is that the control doesn't scroll during D&D: the list is longer as the displayed window. If I select the first or the last item in the list (first/last row) and want o move to the last/first position, which is not visible, the view should scroll somehow in order to show the target drop row. But it doesn't do it when I move the cursor to the top/bottom of the view.
Can it

Is possible to make this with the AdvBandedGridView?
I've tryed to make the same but in the:
Private Sub GridControl1_DragOver(sender As System.Object, e As System.Windows.Forms.DragEventArgs) Handles GridControl1.DragOver
    ' If e.Data.GetDataPresent(GetType(GridHitInfo))

allways returns False, so never enters the IF.

Hi created a new ticket for this implementation as i dont find that it works

Here is the ticket ID : T114366

Hello,
Ok, let's continue our discussion in this ticket.

Hi,

This works fine for me after I changed my "Order" column to decimal in my database.

I'd like to know how to change this value and make sure that RowUpdated() is fired though, like when I edit a row normally.

Thanks for this example.

M.Young

Please post a solution if the datasource is not a datatable or dataset and is List<SomeRecord>.

Hello,

To process your recent post more efficiently, I created a separate ticket on your behalf: T296044: Please post a solution if the datasource is not a datatable or dataset and is List<SomeRecord>. This ticket is currently in our processing queue. Our team will address it as soon as we have any updates.

Hello Sasha,
thank you for your answer.
I tried the E764 example but if i use my existing BindingSource I get a conversion issue on this line:

Dim oldRow As Customer = sourceTable(oldRowIndex)

System.InvalidCastException: 'The object of type' System.Data.DataRowView 'can not be converted to type' SRDCM.Customer '.'

Maby you can help?

Hello Stefan,
I believe it will be more suitable to discuss this in a separate thread so I've created a new ticket on your behalf: Use the E764 example with BindingSource as the Grid's data source.
I will address it shortly.

Question Comments

I see that I missed a similar question in your thread (T424596). Please accept my apologies for that. I hope you wouldn't mind if I answer you there.
I've updated both your description and my answer in that thread. Take a moment to review it and let me know if you have other questions. 

Question Comments

This code seems to name the Excel sheets by category name. I see in the documentation it says excel sheet names are only named 1,2,3,4,etc with a constant as the sheet name prefix. Do you have any straightforward solution to name the sheet names by grouped band or something similar?

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Thanks for the example. I developed ISequentialNumber domain component which based on this article and code. Now this sequential number functonatility shon in this example work with domain components and shared parts.

using System;
using System.Collections.Generic;
using System.ComponentModel;

using DevExpress.ExpressApp.DC;
using DevExpress.Persistent.Base;
using DevExpress.Xpo;
using DevExpress.Xpo.Metadata;
using DevExpress.ExpressApp;
using DevExpress.Persistent.Base;
using DevExpress.Persistent.BaseImpl;
using DevExpress.Persistent.Validation;

using MyWay.Xaf.Module;
using MyWay.Xaf.Utils.Sequence;

namespace MyWay.Xaf.Module
{
    [DomainComponent]
    [NavigationItem]
    public interface ISequentialNumber
    {
        #region PROPERTIES

        #region SequentialNo

        [Persistent]
        string SequentialNo
        {
            get;
        }

        #endregion SequentialNo

        #region SequentialNumber
        
        [System.ComponentModel.Browsable(false)]
        [Indexed(Unique = false)]
        long SequentialNumber
        {
            get ;
            set;
        }

        #endregion SequentialNumber

        #endregion PROPERTIES
    }

    [DomainLogic(typeof(ISequentialNumber))]
    public class ISequentialNumberLogic
    {

            public static string Get_SequentialNo(ISequentialNumber instance)
            {
                return "asd" + instance.SequentialNumber.ToString();
            }

        private static object syncRoot = new object();
        private static SequenceGenerator sequenceGenerator;

        #region METHODS

        #region PUBLIC METHODS

        #region GenerateSequence

        public static void GenerateSequence(ISequentialNumber instance)
        {
            lock (syncRoot)
            {
                Dictionary<string, bool> typeToExistsMap = new Dictionary<string, bool>();

                foreach (object item in ((XPBaseObject)instance).Session.GetObjectsToSave())
                {
                    typeToExistsMap[((XPBaseObject)instance).Session.GetClassInfo(item).FullName] = true;
                }

                if (sequenceGenerator == null)
                {
                    sequenceGenerator = new SequenceGenerator(typeToExistsMap);
                }

                SubscribeToEvents(((XPBaseObject)instance).Session);
                OnSequenceGenerated(sequenceGenerator.GetNextSequence(((XPBaseObject)instance).ClassInfo), instance);
            }
        }

        #endregion GenerateSequence

        #endregion PUBLIC METHODS

        #region PROTECTED METHODS

        #region OnSaving

        public static void OnSaving(ISequentialNumber instance)
        {
            try
            {
                //base.OnSaving();
                if (((XPBaseObject)instance).Session.IsNewObject(instance) && !typeof(NestedUnitOfWork).IsInstanceOfType(((XPBaseObject)instance).Session))
                {
                    GenerateSequence(instance);
                }
            }
            catch
            {
                CancelSequence(((XPBaseObject)instance).Session);
                throw;
            }
        }

        #endregion OnSaving

        #endregion PROTECTED METHODS

        #region INTERNAL METHODS

        #endregion INTERNAL METHODS

        #region PRIVATE METHODS

        #region AcceptSequence

        private static void AcceptSequence(Session session)
        {
            lock (syncRoot)
            {
                if (sequenceGenerator != null)
                {
                    try
                    {
                        sequenceGenerator.Accept();
                    }
                    finally
                    {
                        CancelSequence(session);
                    }
                }
            }
        }

        #endregion AcceptSequence

        #region CancelSequence

        private static void CancelSequence(Session session)
        {
            lock (syncRoot)
            {
                UnSubscribeFromEvents(session);
                if (sequenceGenerator != null)
                {
                    sequenceGenerator.Close();
                    sequenceGenerator = null;
                }
            }
        }

        #endregion CancelSequence

        #region Session_AfterCommitTransaction

        private static void Session_AfterCommitTransaction(object sender, SessionManipulationEventArgs e)
        {
            
            AcceptSequence(e.Session);
        }

        #endregion Session_AfterCommitTransaction

        #region Session_AfterRollBack

        private static void Session_AfterRollBack(object sender, SessionManipulationEventArgs e)
        {
            CancelSequence(e.Session);
        }

        #endregion Session_AfterRollBack

        #region Session_FailedCommitTransaction

        private static void Session_FailedCommitTransaction(object sender, SessionOperationFailEventArgs e)
        {
            CancelSequence((Session)sender);
        }

        #endregion Session_FailedCommitTransaction

        #region SubscribeToEvents

        private static void SubscribeToEvents(Session session)
        {
            if (!(session is NestedUnitOfWork))
            {
                session.AfterCommitTransaction += Session_AfterCommitTransaction;
                session.AfterRollbackTransaction += Session_AfterRollBack;
                session.FailedCommitTransaction += Session_FailedCommitTransaction;
            }
        }

        #endregion SubscribeToEvents

        #region UnSubscribeFromEvents

        private static void UnSubscribeFromEvents(Session session)
        {
            if (!(session is NestedUnitOfWork))
            {
                session.AfterCommitTransaction -= Session_AfterCommitTransaction;
                session.AfterRollbackTransaction -= Session_AfterRollBack;
                session.FailedCommitTransaction -= Session_FailedCommitTransaction;
            }
        }

        #endregion UnSubscribeFromEvents

        #region OnSequenceGenerated

        private static void OnSequenceGenerated(long newId, ISequentialNumber instance)
        {
            instance.SequentialNumber = newId;
        }

        #endregion OnSequenceGenerated

        #endregion PRIVATE METHODS

        #endregion METHODS
    }
}

Hi Mr. Murat YILMAZ, Can yo provide some example to use the class. I am looking it for shared parts

I implemented this OK in a Solution

When I eimplmented it in a different solution I got an Exception
"Message: Value cannot be null.
Parameter name: Application"

thrown at:

    public static void Initialize() {
            Guard.ArgumentNotNull(Application, "Application");

@Andrew: You forgot to add the following code:

public override void Setup(XafApplication application) {
            base.Setup(application);
            SequenceGeneratorInitializer.Register(application);
        }

You will not experience this and similar difficulties if you simply add the reusable module into your solution as per instructions above.

Hi,
Is this now supported in Middle-Tier XAF applications?

Thanks,

Carlitos

We have not performed additional R&D and testing of this particular example in a middle-tier scenario. Moreover, I see technical problems using this particular solution in this configuration, because here we use ExplicitUnitOfWork, which implies that it will be a sole owner of the database connection. Probably, for this configuration, it is better to stick to a standard solution, e.g. using database triggers. 

Hi Dennis,
But how does the Middle-tier handle database connections? I thought it would do some sort of connection pooling and manage all client connections?

Why do you think that Triggers are a good alternative?

Carlos

By default, the middle-tier app server uses ThreadSafeDataLayer to effectively handle requests from multiple clients at the same time. Connection pooling may be used here, but this is not managed by us by default and is rather controller by ADO.NET transparently for a consumer. My main concern here was that in such a multi-user environment it will not be possible to exclusively lock the connection by one user.
A solution at the database level looks more universal as it works at the database level and is irrelevant to whether the app server is used or not. 

In XAF application I have about 25 various business objects that need to generate unique user friendly sequence numbers in when saved. For example Customer Number, Invoice Number, Order Number, etc. Many users are going to work concurrently and everything should work in transaction.

Which approach should I use, the one in E2620 or E2829?.

I felt E2620 a bit better as I need not to inherit my classes (25 of them) from  UserFriendlyIdPersistentObject as shown in E2829.  

But approach in E2829 is said to be primarily for XAF applications

@Vishwas: Both E2620  and E2829 demonstrate the same solution using ExplicitUnitOfWork. E2829 is just a bit better integrated with the XAF infrastructure.
If you do not want to inherit from a common base class, I suggest you consider using How to generate a sequential and user-friendly identifier field within a business class, which is simpler to implement and provides similar capabilities without using ExplicitUnitOfWork.

OK thanks Dennis.

Will simpler approach in "How to generate a sequential and user-friendly identifier field within a business class" handle concurrent users creating same business objects properly?. We can assume about 25 Concurrent users for same business object, with SQL Server DB.

Some users will be accessing system over low banddwidth VPN internet connection. (for Sale Invoice object which needs to generate sequencial Invoice Numbers)

@Vishwas: Yes, it will. The DistributedIdGeneratorHelper class tries to save a record and repeats its attempts several times until it reaches the maximum number or saves data completely. Check out the corresponding source code for more details on how this works.

Thanks Dennis