C#,dataSet转string,string转Dataset,DataTable转string

dataSet转string  实际上是转xml格式的字符串

string转dataset   是xml格式转DataSet

DataTable转string   是先把DataTable添加到DataSet  然后再转string

以下是核心代码

        /// <summary>
        /// 代码生成一个DataTable
        /// </summary>
        /// <returns></returns>
        private DataTable testDataTable()
        {
            DataTable tblDatas = new DataTable("Datas");
            DataColumn dc = null;
            dc = tblDatas.Columns.Add("ID", Type.GetType("System.Int32"));
            dc.AutoIncrement = true;//自动增加
            dc.AutoIncrementSeed = 1;//起始为1
            dc.AutoIncrementStep = 1;//步长为1
            dc.AllowDBNull = false;//

            dc = tblDatas.Columns.Add("Product", Type.GetType("System.String"));
            dc = tblDatas.Columns.Add("Version", Type.GetType("System.String"));
            dc = tblDatas.Columns.Add("Description", Type.GetType("System.String"));

            DataRow newRow;
            newRow = tblDatas.NewRow();
            newRow["Product"] = "大话西游";
            newRow["Version"] = "2.0";
            newRow["Description"] = "我很喜欢";
            tblDatas.Rows.Add(newRow);

            newRow = tblDatas.NewRow();
            newRow["Product"] = "梦幻西游";
            newRow["Version"] = "3.0";
            newRow["Description"] = "比大话更幼稚";
            tblDatas.Rows.Add(newRow);

            return tblDatas;
        }

        /// <summary>
        /// DataSet转string
        /// </summary>
        /// <param name="ds"></param>
        /// <returns></returns>
        private string DataSetToString(DataSet ds)
        {
            return ds.GetXml();
        }

        /// <summary>
        /// String转DataSet
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        private DataSet StringToDataSet(string str)
        {
            DataSet ds = null;
            try
            {
                StringReader sr = new StringReader(str);
                ds = new DataSet();
                ds.ReadXml(sr);
                return ds;
            }
            catch (Exception ex) { }

            return ds;
        }

以下是方法调用

      private void button1_Click(object sender, EventArgs e)      
      {
            DataSet ds = new DataSet();
            DataTable dt = testDataTable();//得到一个DataTable
            ds.Tables.Add(dt);//将dataTable添加到dataSet里面

            string s = DataSetToString(ds);//DataSet转string

            DataSet ds2 = StringToDataSet(s);//String转DataSet
        }