It seemsthe issue is caused by a bug in our WebGrid. A bug report has been submitted to our developer.

In the mean time, you could try using this workaround. The idea is to check whether the row has ny field changed, if there is no change invoke the acceptchanges function to reset the rowstate. Here is the snippet, the snippet is in C#:

void WebGrid1_InitializeRow(object sender, ISNet.WebUI.WebGrid.RowEventArgs e)
{
    if (e.Row.Type == RowType.Record)
    {
        DataRowView dr = (DataRowView)e.Row.DataRow;
        try
        {
            bool identicalRow = true;
            if (dr.Row.RowState == DataRowState.Modified)
            {
                for (int i = 0; i < dr.Row.Table.Columns.Count; i++)
                {
                    if (dr.Row[i, DataRowVersion.Original].ToString() != dr.Row[i, DataRowVersion.Current].ToString())
                    {
                        identicalRow = false;
                        break;
                    }
                }
                if (identicalRow)
                    dr.Row.AcceptChanges();
            }

            e.Row.Cells.GetNamedItem("RowState").Value = dr.Row.RowState.ToString();
            e.Row.Cells.GetNamedItem("RowState").Text = dr.Row.RowState.ToString();
        }
        catch (Exception excp)
        {
            //e.Row.Cells.GetNamedItem("RowState").Value = "ERROR"
            //e.Row.Cells.GetNamedItem("RowState").Text = "ERROR"
        }
    }
}

I have discussed your concern with the developer and it seems the issue cause by visual studio path limitation to 246 character.

We will provide a KB article for this issue for other users who might have the same issue.

If you wish to retrieve the total row from filtered grid, you will need to get the count from the defaultview not the datatable. Here is the new snippet:

protected void WebGrid1_PrepareDataBinding(object sender, DataSourceEventArgs e)
{
    rowTotal.Value = ((DataTable)WebGrid1.DataSource).DefaultView.Count.ToString();
}

You will also need to update the hidden value after every filter using the InitialisePostback server side event handler:

protected void WebGrid1_InitializePostBack(object sender, PostbackEventArgs e)
{
    if (e.Action == PostBackAction.ColumnFilter)
    {
        rowTotal.Value = ((DataTable)WebGrid1.DataSource).DefaultView.Count.ToString();
        WebGrid1.ClientAction.RenderControl(rowTotal);
    }
}

Based on my test, if I use the Intersoft ClientUI MVVM Business Application template under Silverlight folder the solution will build successfully in both VS 2010 and Blend 4. However, using the Intersoft ClientUI MVVM Business Application template under Intersoft Solutions / Silverlight does produce some issue.

I have submitted a bug report for this template issue, I am very sorry for the inconvinience caused by this issue. The developer just updated me that issue is caused because the path to the project template is too long so it could cause the issue I am having. Try using the solution provided under Silverlight folder or move the template project location so the path will be shorter.

I also could not replicate the interface in which you could only input the name of the project in VS 2010, in my test creating a new solution will require us to input Name, Location, and Solution Name.

The one we will be releasing in August 18, 2010 is WebUI Studio 2010 R1.

Regarding your issue, I could not replicate it using our Contacts_MVVM sample. Attached is the modified file form the sample in order for me to create your scenario. If the list is empty, the Presenter status will be ready and the content will be displayed correctly.

In the ContactViewModel.cs, I add a few property to be used as a column in Presenter. The ContactViews.xaml page is modified to use GridPresenter.

In order to simulate empty list, I modify the LoadContacts LINQ, here is the snippet:

var contacts = from x in doc.Descendants("Customer")
               where 1 == 0
               select new Contact(x);