[RESOLVED] Problem with DatagridView wrapping

[mrjohn]

Hi,
I have a DataGridView with one column,I set for that column DefaultcelStyle->Wrapmode=True

Modify data a with a long string,I call also

DataGridView1.AutoResizeRows()
        DataGridView1.Refresh()

But the DataGridView doesn't refresh wrap,il looks like this :


I change manually current selected row moving to another record and now the refresh is done :


How to solve that automatically ?
Also sample attached.
Thanks !

[mrjohn]

still need help,thanks !

[kareninstructor]

A solution is here with an attached working project http://www.vbforums.com/showthread.p...09#post4076109

Make sure to read the comments in the project.

[mrjohn]

Thanks,but not solving for my case,I added this 2 lines in load of form,but the same problem :

DataGridView1.DefaultCellStyle.WrapMode = DataGridViewTriState.True
        DataGridView1.Columns.Item(0).DefaultCellStyle.WrapMode = DataGridViewTriState.True

A solution is here with an attached working project http://www.vbforums.com/showthread.p...09#post4076109

Make sure to read the comments in the project.

[kareninstructor]

Thanks,but not solving for my case,I added this 2 lines in load of form,but the same problem :

DataGridView1.DefaultCellStyle.WrapMode = DataGridViewTriState.True
        DataGridView1.Columns.Item(0).DefaultCellStyle.WrapMode = DataGridViewTriState.True

Then you are doing something incorrect from what I gave you and indicated to read the instructions.

Example, I took the example given to you and replaced the static lines of filling the DataTable rows with a dynamic method of reading a Text File and it worked just fine as suspected.

Private Sub Form3_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    Dim dt As New DataTable

    dt.Columns.AddRange(New DataColumn() _
       {New DataColumn("Identifier", GetType(System.Int32)), _
        New DataColumn("Field1", GetType(System.String))})

    Dim Request = (From line In IO.File.ReadAllLines("Document.txt") _
                   Where line.Length > 0 _
                   Let Items = line.Split(","c) _
                   Select New With _
                        {.ID = Items(0), _
                         .Text = Items(1) _
                        } _
                    ).ToList

    For Each line In Request
        dt.Rows.Add(New Object() {line.ID, line.Text})
    Next
    DataGridView1.DataSource = dt
    DataGridView1.Columns.Item("Column2").DefaultCellStyle.WrapMode = DataGridViewTriState.True
End Sub

Contents of Document text which has line breaks is attached.

[mrjohn]

Thanks kevininstructor for your answer. The problem is when I update data grid, I first run with short string data (no wrap need) then I modify data to need wrap,but the grid doesn't do that automatically.
I've attached again the sample,this time I used your txt file and code,I just create a second string column and put there first 10 caracter from column 1 in order to have initial no wrapping needed.
Run the sample and press Modify data button,there I put column 1 (long) into 2 (short text) but the grid doesn't refresh automatically,no wrap is done

Thanks !

[kareninstructor]

Changing properties of the DataGridView will not help in this case, instead you need to work at the DataSource level, the DataTable then tell the BindingSource as shown below.

Code to make this work is marked in red. Note I took some of your code out.

Public Class Form1
    Dim dt As New DataTable
    Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

        dt.Columns.AddRange(New DataColumn() _
           {New DataColumn("Identifier", GetType(System.Int32)), _
            New DataColumn("Field1", GetType(System.String)), New DataColumn("Field2", GetType(System.String))})

        Dim Request = (From line In IO.File.ReadAllLines("Document.txt") _
                       Where line.Length > 0 _
                       Let Items = line.Split(","c) _
                       Select New With _
                            {.ID = Items(0), _
                             .Text = Items(1) _
                            } _
                        ).ToList

        For Each line In Request
            dt.Rows.Add(New Object() {line.ID, line.Text, line.Text.Substring(0, 10)})
        Next
        dt.AcceptChanges()

        BindingSource1.DataSource = dt

        DataGridView1.Columns(0).DefaultCellStyle.WrapMode = DataGridViewTriState.True
    End Sub
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        DirectCast(BindingSource1.Current, DataRowView)("Field2") = dt.Rows(0)("Field1").ToString
        DirectCast(BindingSource1.DataSource, DataTable).AcceptChanges()
        BindingSource1.ResetCurrentItem()
    End Sub
End Class

[mrjohn]

SOLVED !
A BIG THANKS kevininstructor FOR YOUR TIME AND PATIENCE!!!!