protected void RadGrid1_ExcelMLExportStylesCreated(object source, GridExportExcelMLStyleCreatedArgs e)
{
    foreach (StyleElement style in e.Styles)
    {
        switch (style.Id)
        {
            case "itemStyle":
                style.FontStyle.Color = System.Drawing.Color.LightBlue;
                break;
            case "alternatingItemStyle":
                style.FontStyle.Color = System.Drawing.Color.Blue;
                break;
        }
    }
}

Protected Sub RadGrid1_ExcelMLExportStylesCreated(ByVal source As Object, ByVal e As GridExportExcelMLStyleCreatedArgs) Handles RadGrid1.ExcelMLExportStylesCreated
    For Each style As StyleElement In e.Styles
        Select Case style.Id
            Case "itemStyle"
                style.FontStyle.Color = System.Drawing.Color.LightBlue
                Exit Select
            Case "alternatingItemStyle"
                style.FontStyle.Color = System.Drawing.Color.Blue
                Exit Select
        End Select
    Next
End Sub

protected void RadGrid1_ExcelMLExportRowCreated(object source, GridExportExcelMLRowCreatedArgs e)
{
    e.Row.Cells.GetCellByName("Name").StyleValue = "myCustomStyle";
}
protected void RadGrid1_ExcelMLExportStylesCreated(object source, GridExportExcelMLStyleCreatedArgs e)
{
    StyleElement myStyle = new StyleElement("myCustomStyle");
    myStyle.NumberFormat.FormatType = NumberFormatType.Currency;
    myStyle.FontStyle.Bold = true;
    e.Styles.Add(myStyle);
}

Protected Sub RadGrid1_ExcelMLExportRowCreated(ByVal source As Object, ByVal e As GridExportExcelMLRowCreatedArgs) Handles RadGrid1.ExcelMLExportRowCreated
    e.Row.Cells.GetCellByName("Name").StyleValue = "myCustomStyle"
End Sub
Protected Sub RadGrid1_ExcelMLExportStylesCreated(ByVal source As Object, ByVal e As GridExportExcelMLStyleCreatedArgs) Handles RadGrid1.ExcelMLExportStylesCreated
    Dim myStyle As New StyleElement("myCustomStyle")
    myStyle.NumberFormat.FormatType = NumberFormatType.Currency
    myStyle.FontStyle.Bold = True
    e.Styles.Add(myStyle)
End Sub

protected void RadGrid1_ExcelMLExportRowCreated(object source, GridExportExcelMLRowCreatedArgs e)
{
    e.Row.Cells.GetCellByName("Name").StyleValue = "myCustomStyle";
}
protected void RadGrid1_ExcelMLExportStylesCreated(object source, GridExportExcelMLStyleCreatedArgs e)
{
    StyleElement myStyle = new StyleElement("myCustomStyle");
    myStyle.NumberFormat.FormatType = NumberFormatType.Currency;
    myStyle.FontStyle.Bold = true;
    e.Styles.Add(myStyle);
}

Protected Sub RadGrid1_ExcelMLExportRowCreated(ByVal source As Object, ByVal e As GridExportExcelMLRowCreatedArgs) Handles RadGrid1.ExcelMLExportRowCreated
    e.Row.Cells.GetCellByName("Name").StyleValue = "myCustomStyle"
End Sub
Protected Sub RadGrid1_ExcelMLExportStylesCreated(ByVal source As Object, ByVal e As GridExportExcelMLStyleCreatedArgs) Handles RadGrid1.ExcelMLExportStylesCreated
    Dim myStyle As New StyleElement("myCustomStyle")
    myStyle.NumberFormat.FormatType = NumberFormatType.Currency
    myStyle.FontStyle.Bold = True
    e.Styles.Add(myStyle)
End Sub 

<ExportSettings>
    <Excel DefaultCellAlignment="Center" />
</ExportSettings>

style.NumberFormat.Attributes["ss:Format"] = "MM/dd";

style.NumberFormat.Attributes("ss:Format") = "MM/dd"

protected void RadGrid1_ExcelMLExportStylesCreated(object source, GridExcelBuilder.GridExportExcelMLStyleCreatedArgs e)
{
    StyleElement cstyle = new StyleElement("MyCustomStyle");
    BorderStylesCollection borders = new BorderStylesCollection();
    BorderStyles borderStyle;
    for (int i = 1; i <= 4; i++) //four borders   
    {
        borderStyle = new BorderStyles();
        borderStyle.PositionType = (PositionType)i;
        borderStyle.Color = System.Drawing.Color.Black;
        borderStyle.LineStyle = LineStyle.Continuous;
        borderStyle.Weight = 1.0;
        borders.Add(borderStyle);
    }
    foreach (BorderStyles border in borders)
        cstyle.Borders.Add(border);
    e.Styles.Add(cstyle);
}

Protected Sub RadGrid1_ExcelMLExportStylesCreated(ByVal source As Object, ByVal e As GridExportExcelMLStyleCreatedArgs) Handles RadGrid1.ExcelMLExportStylesCreated

    Dim cstyle As New StyleElement("MyCustomStyle")
    Dim borders As New BorderStylesCollection()
    Dim borderStyle As BorderStyles
    For i As Integer = 1 To 4
        'four borders    
        borderStyle.PositionType = DirectCast(i, PositionType)
        borderStyle.Color = System.Drawing.Color.Black
        borderStyle.LineStyle = LineStyle.Continuous
        borderStyle.Weight = 1.0R
        borders.Add(borderStyle)
    Next
    For Each border As BorderStyles In borders
        cstyle.Borders.Add(border)
    Next
    e.Styles.Add(cstyle)
End Sub

protected void Button1_Click(object sender, EventArgs e)
{
    RadGrid1.MasterTableView.GetColumn("ColumnName").Visible = false;
    RadGrid1.MasterTableView.ExportToExcel();
}

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click
    RadGrid1.MasterTableView.GetColumn("ColumnName").Visible = False
    RadGrid1.MasterTableView.ExportToExcel()
End Sub

protected void RadGrid1_ExcelMLWorkBookCreated(object sender, Telerik.Web.UI.GridExcelBuilder.GridExcelMLWorkBookCreatedEventArgs e)
{
    e.WorkBook.Worksheets[0].IsProtected = true;

    StyleElement protectionStyle = new StyleElement("ProtectionStyle");
    protectionStyle.CellProtection.IsProtected = false;
    e.WorkBook.Styles.Add(protectionStyle);

    foreach (RowElement row in e.WorkBook.Worksheets[0].Table.Rows)
    {
        int rowIndex = e.WorkBook.Worksheets[0].Table.Rows.IndexOf(row);
        //check whether the row is even
        if (rowIndex % 2 == 0)
        {
            //only the cells on the even rows will be unlocked
            foreach (CellElement cell in row.Cells)
            {
                cell.StyleValue = "ProtectionStyle";
            }
        }
    }
}

Protected Sub RadGrid1_ExcelMLWorkBookCreated(sender As Object, e As Telerik.Web.UI.GridExcelBuilder.GridExcelMLWorkBookCreatedEventArgs)
    e.WorkBook.Worksheets(0).IsProtected = True

    Dim protectionStyle As New StyleElement("ProtectionStyle")
    protectionStyle.CellProtection.IsProtected = False
    e.WorkBook.Styles.Add(protectionStyle)

    For Each row As RowElement In e.WorkBook.Worksheets(0).Table.Rows
        Dim rowIndex As Integer = e.WorkBook.Worksheets(0).Table.Rows.IndexOf(row)
        'check whether the row is even
        If rowIndex Mod 2 = 0 Then
            'only the cells on the even rows will be unlocked
            For Each cell As CellElement In row.Cells
                cell.StyleValue = "ProtectionStyle"
            Next
        End If
    Next
End Sub

protected void grid_ExcelMLWorkBookCreated(object sender, Telerik.Web.UI.GridExcelBuilder.GridExcelMLWorkBookCreatedEventArgs e)
{
    e.WorkBook.Worksheets[0].WorksheetOptions.Print.PaperSize = System.Drawing.Printing.PaperKind.A4;
    e.WorkBook.Worksheets[0].WorksheetOptions.FitToPage = true;
    e.WorkBook.Worksheets[0].WorksheetOptions.Print.FitHeight = 1;
}

Protected Sub grid_ExcelMLWorkBookCreated(sender As Object, e As Telerik.Web.UI.GridExcelBuilder.GridExcelMLWorkBookCreatedEventArgs)
    e.WorkBook.Worksheets(0).WorksheetOptions.Print.PaperSize = System.Drawing.Printing.PaperKind.A4
    e.WorkBook.Worksheets(0).WorksheetOptions.FitToPage = True
    e.WorkBook.Worksheets(0).WorksheetOptions.Print.FitHeight = 1
End Sub