这是一段silverlight导出Excel的代码 来自zhangfengyi

/// <summary> /// 导出DataGrid数据到Excel
        /// </summary>
        /// <param name="withHeaders">是否需要表头</param>
        /// <param name="grid">DataGrid</param>
        /// <returns>Excel内容字符串</returns>
        public static string ExportDataGrid(bool withHeaders,DataGrid grid)
        {
            string colPath; System.Reflection.PropertyInfo propInfo;
            System.Windows.Data.Binding binding;
            System.Text.StringBuilder strBuilder = new System.Text.StringBuilder();
            System.Collections.IList source = (grid.ItemsSource as System.Collections.IList);
            if (source == null) return "";
            List<string> headers = new List<string>();
            grid.Columns.ToList().ForEach(col =>
            {
                if (col is DataGridBoundColumn)
                { headers.Add(FormatCSVField(col.Header.ToString())); }
            });
            strBuilder.Append(String.Join(",",headers.ToArray())).Append("/r/n");
            foreach (Object data in source)
            {
                List<string> csvRow = new List<string>();
                foreach (DataGridColumn col in grid.Columns)
                {
                    if (col is DataGridBoundColumn)
                    {
                        binding = (col as DataGridBoundColumn).Binding;
                        colPath = binding.Path.Path;
                        propInfo = data.GetType().GetProperty(colPath);
                        if (propInfo != null)
                        {
                            csvRow.Add(FormatCSVField(propInfo.GetValue(data,null).ToString()));
                        }
                    }
                }
                strBuilder.Append(String.Join(",csvRow.ToArray())).Append("/r/n");
            }
            return strBuilder.ToString();        }