using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Collections.Generic;
using System.Windows.Data;
using System.Reflection;

namespace MySlSyj
{
    public static class dataGridkz
    {
        public static string ExportDataGrid(this DataGrid grid, bool withHeaders)
        {
            string colPath;
            System.Reflection.PropertyInfo propInfo;
            System.Windows.Data.Binding binding;
            System.Text.StringBuilder strBuilder = new System.Text.StringBuilder();          

            List<string> headers = new List<string>();
            List<string> GetValue = new List<string>();
            foreach (var cl in grid.Columns)
            {
                headers.Add(FormatCSVField(cl.Header.ToString()));

            }
          
            strBuilder
            .Append(String.Join("", headers.ToArray()))
            .Append("\t\n");


            ////
            //int i = 0;
            string AA = "";
            foreach (Object data in grid.ItemsSource)
            {
                var csvRow = new List<string>();
               
                foreach (DataGridColumn col in grid.Columns)
                {
                    string strValue = "";
                   
                    Binding objBinding = null;
                    if (col is DataGridBoundColumn)

                        objBinding = (col as DataGridBoundColumn).Binding;

                    if (col is DataGridTemplateColumn)
                    {
                        //这是一个模板列
                        DependencyObject objDO = (col as DataGridTemplateColumn).CellTemplate.LoadContent();
                        FrameworkElement oFE = (FrameworkElement)objDO;
                        FieldInfo oFI = oFE.GetType().GetField("TextProperty");
                        if (oFI != null)
                        {
                            if (oFI.GetValue(null) != null)
                            {
                                if (oFE.GetBindingExpression((DependencyProperty)oFI.GetValue(null)) != null)
                                    objBinding = oFE.GetBindingExpression((DependencyProperty)oFI.GetValue(null)).ParentBinding;
                            }
                        }
                    }
                    if (objBinding != null)
                    {
                        if (objBinding.Path.Path != "")
                        {
                            PropertyInfo pi = data.GetType().GetProperty(objBinding.Path.Path);
                            if (pi != null) strValue = pi.GetValue(data, null).ToString();
                        }
                        if (objBinding.Converter != null)
                        {
                            if (strValue != "")
                                strValue = objBinding.Converter.Convert(strValue, typeof(string), objBinding.ConverterParameter, objBinding.ConverterCulture).ToString();
                            else
                                strValue = objBinding.Converter.Convert(data, typeof(string), objBinding.ConverterParameter, objBinding.ConverterCulture).ToString();
                        }
                    }
                  
                   GetValue.Add(FormatCSVField(strValue));                
                }
              
              strBuilder.Append(String.Join("", GetValue.ToArray())).Append("\t\n");
              GetValue.Clear();           
            }
            
            return strBuilder.ToString();
        }


        private static string FormatCSVField(string data)
        {
            
            return String.Format("\t{0}", data.Replace("\"", "\t\n"));
        }

    }
}