Silverlight的DataGrid中：导出到Excel或CSV 3

 

using System;
using System.Windows;
using System.Windows.Data;
using System.Windows.Media;
using System.Windows.Controls;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.IO;
using System.Reflection;
using System.Xml.Linq;

public static class DataGridExtensions
{
    public static void Export(this DataGrid dg)
    {
        ExportDataGrid(dg);//dg is DataGrid name
    }

    public static void ExportDataGrid(DataGrid dGrid)
    {
        SaveFileDialog objSFD = new SaveFileDialog() { DefaultExt = "csv",Filter = "CSV Files (*.csv)|*.csv|Excel XML (*.xml)|*.xml|All files (*.*)|*.*",FilterIndex = 1 };
        if (objSFD.ShowDialog() == true)
        {
            string strFormat = objSFD.SafeFileName.Substring(objSFD.SafeFileName.IndexOf('.') + 1).toupper();
            StringBuilder strBuilder = new StringBuilder();
            if (dGrid.ItemsSource == null) return;
            List<string> lstFields = new List<string>();
            if (dGrid.HeadersVisibility == DataGridHeadersVisibility.Column || dGrid.HeadersVisibility == DataGridHeadersVisibility.All)
            {
                foreach (DataGridColumn dgcol in dGrid.Columns)
                    lstFields.Add(FormatField(dgcol.Header.ToString(),strFormat));
                BuildStringOfRow(strBuilder,lstFields,strFormat);
            }
            foreach (object data in dGrid.ItemsSource)
            {
                lstFields.Clear();
                foreach (DataGridColumn col in dGrid.Columns)
                {
                    string strValue = "";