Hi, Hengky,

In case you don't want to use a GridViewMaskBoxColumn , please have in mind that RadGridView offers the CellFormatting event which gives you the possibility to display any text in the cell by setting the CellElement.Text property to the desired text.

Thus, considering the cell's Value, you can format the CellElement.Text according to your needs.

I hope this information helps.

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik

Hi.. Dess sorry for late post ... 

I tried to create form Template ... 

with grid inside in the form ... 

i have made setting for grid ... 

like this ... 

        If HColumnsFormat.Count > 0 Then
            For i = 0 To HColumnsFormat.Count - 1
                Try
                    If String.IsNullOrEmpty(HColumnsFormat(i)) Then
                        Continue For
                    End If
                    GridList.Columns(i).FormatString = HColumnsFormat(i)
                Catch ex As Exception

                End Try
            Next
        End If

this code is for format the column .... like {0:#,##0}, now i need to make one column {####-##.##} formated
how to make this ... 

TQ

Hello, Hengky,

You can set any custom formatted text that you want to the Text property of the CellElement in CellFormatting event. For more information about formatting text please refer to the following MSDN articles:
https://docs.microsoft.com/en-us/dotnet/api/system.string.format?view=netcore-3.1 
https://docs.microsoft.com/en-us/dotnet/standard/base-types/custom-numeric-format-strings?redirectedfrom=MSDN#the--custom-specifier-1 
https://docs.microsoft.com/en-us/dotnet/api/system.string.substring?view=netcore-3.1 

Here is a sample demonstration:

 private void RadGridView1_CellFormatting(object sender, CellFormattingEventArgs e)
 {
     if (e.CellElement.RowIndex > -1)
     {
         if (e.CellElement.ColumnIndex == 0)
         {
             e.CellElement.Text = string.Format("{0:##-##.00}", (double)e.CellElement.Value);
         }
         else
         {
             e.CellElement.ResetValue(LightVisualElement.TextProperty, ValueResetFlags.Local);
         }
     }
 }

I hope this helps. Should you need further assistance do not hesitate to ask.

Regards,
Nadya
Progress Telerik

Hello nad... 

How to cast maskedbox in child ... ? with format ####-##.## 

                        Dim firstChildtemplate As New GridViewTemplate()
                        firstChildtemplate.DataSource = (ds.Tables("Detail"))
                        firstChildtemplate.AllowEditRow = False
                        firstChildtemplate.AllowAddNewRow = False
                        .MasterTemplate.Templates.Add(firstChildtemplate)
                        With firstChildtemplate

                            .BestFitColumns(BestFitColumnMode.AllCells)
                            .AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill

                            DirectCast(.Columns("KodeRekening"), GridViewMaskBoxColumn).Mask = "{####-##.##}"

                            .Columns("KodeRekening").HeaderText = "REKENING"
                            .Columns("KodeRekening").Width = 100
                            .Columns("KodeRekening").AllowResize = False
                            .Columns("KodeRekening").TextAlignment = ContentAlignment.MiddleCenter
                        End With

thanks before

Hello, Hengky,   

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik

Hai dess

I just need to cast gridview to maskbox

It's working well if i made to parent grid.

But i dont know how to cast in grid child...

Hai Dess ... How r u ? 

Hopely everything fine ... in this covid pandemi ... 

Dess... can we just like this code ... for maskedbox ? 

DirectCast(.Columns("Tgl"), GridViewDateTimeColumn).FormatString = "{0:dd/MM/yyyy}"

if i just replace to .... , GridViewMaskedColun ... it;s getting error . 

Thanks Des... 

Hello, Hengky,   

If the column doesn't cast to GridViewMaskBoxColumn successfully, this means that it is most probably of another type, e.g. GridViewDecimalColumn. Please make sure that the column is the expected type before converting it to GridViewMaskBoxColumn. Otherwise, you can remove the already existing column and add a new one as below: 

        Me.RadGridView1.MasterTemplate.Templates(0).Columns.Remove("UnitPrice")
        Dim maskBoxColumn As New GridViewMaskBoxColumn() 
        maskBoxColumn.FieldName = "UnitPrice" 
        maskBoxColumn.MaskType = MaskType.Numeric
        maskBoxColumn.Mask = "C" 
        maskBoxColumn.FormatString = "{0:C}"
        maskBoxColumn.DataType = GetType(Decimal)
        Me.RadGridView1.MasterTemplate.Templates(0).Columns.Add(maskBoxColumn)

I have attached my sample project for your reference.

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik