WPF及Silverlight中将DataGrid数据导出

这段源码是我在项目中实际应用的源码，没有经过删减及处理。

如果你认为有用可以摘去作为自己的导出类中的一个小工具使用。

/// <summary>
    /// 数据源导出辅助类
    /// </summary>
    /// <remarks>
    /// Author:         sucsy
    /// Create date:    2011-6-17
    /// Description:    提供基于数据源(公共枚举器类型)的数据导出辅助功能
    /// </remarks>
    public class DataSourceExportHelper
    {
        /// <summary>
        /// 导出到文本
        /// </summary>
        /// <param name="dataSource">数据源</param>
        /// <param name="splitString">分隔符</param>
        /// <param name="columns">导出的列（为null时表示全部导出）</param>
        /// <returns>文本数据</returns>
        public static string Export2Text(IEnumerable dataSource,string splitString,DataGridColumn[] columns,bool isVisiableColumn)
        {
            //定义结果存放对象
            StringBuilder sbResult = new StringBuilder();

            string[] columnHeaders = GetSelectedColumns(columns);

            //处理DataTable作为数据源的数据导出操作
            if (dataSource is System.Data.DataView)
            {
                System.Data.DataView dataView = (System.Data.DataView)dataSource;

                //加载数据标题
                foreach (DataColumn objHeaderpi in dataView.Table.Columns)
                {
                    if (columns == null || columnHeaders.Contains(objHeaderpi.ColumnName))
                        sbResult.Append(objHeaderpi.ColumnName + splitString);
                }

                sbResult.AppendLine();

                foreach (System.Data.DataRowView dr in dataView)
                {
                    foreach (DataColumn objHeaderpi in dataView.Table.Columns)
                    {
                        if (columns == null || columnHeaders.Contains(objHeaderpi.ColumnName))
                            sbResult.Append(dr[objHeaderpi.ColumnName].ToString() + splitString);
                    }
                    sbResult.AppendLine();
                }
            }
            else
            {               
                foreach (DataGridColumn dgcol in columns)
                    sbResult.Append(dgcol.Header.ToString() + splitString);

                sbResult.AppendLine();

                foreach (object data in dataSource)
                {
                    foreach (DataGridColumn col in columns)
                    {
                        string strValue = "";
                        Binding objBinding = null;
                        if (col is DataGridBoundColumn)
                            objBinding = (Binding)(col as DataGridBoundColumn).Binding;

                        if (col is DataGridTemplateColumn)
                        {
                            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 != "")
                            {
                                string[] dataTree = objBinding.Path.Path.Split(".".ToArray(), StringSplitOptions.RemoveEmptyEntries);
                                object parentData = data;
                                for (int treeIndex = 0; treeIndex < dataTree.Length; treeIndex++)
                                {
                                    PropertyInfo pData = parentData.GetType().GetProperty(dataTree[treeIndex]);

                                    parentData = pData.GetValue(parentData, null);
                                }

                                if (parentData != null) strValue = parentData.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();
                            }
                        }                       
                        sbResult.Append(strValue.Replace(',', '，') + splitString);
                    }
                    sbResult.AppendLine();
                }

            }

            return sbResult.ToString();
        }
        public static string[] GetSelectedColumns(DataGridColumn[] columns)
        {
            List<string> columnsHeader = new List<string>();
            foreach (DataGridColumn column in columns)
            {
                if (column.Visibility == System.Windows.Visibility.Visible)
                    columnsHeader.Add(column.Header.ToString());
            }

            return columnsHeader.ToArray();
        }



        /// <summary>
        /// 导出为平面文本
        /// </summary>
        /// <param name="dataSource">数据源</param>
        /// <param name="columns">选择要导出的列</param>
        /// <returns>平面文本</returns>
        public static string Export2FlotText(IEnumerable dataSource,DataGridColumn[] columns,bool isVisiableColumn)
        {
            return Export2Text(dataSource, "\t", columns, isVisiableColumn);
        }

        /// <summary>
        /// 导出为平面文本
        /// </summary>
        /// <param name="dataSource">数据源</param>
        /// <param name="columns">选择要导出的列</param>
        /// <returns>平面文本</returns>
        public static string Export2FlotCSV(IEnumerable dataSource,DataGridColumn[] columns,bool isVisiableColumn)
        {
            return Export2Text(dataSource, ",", columns, isVisiableColumn);
        }
    }

希望这段代码能够对你有用。

sucsy 2011-9-23

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