/// <summary> /// 账面数据 Accounting /// </summary> /// <returns></returns> DataTable setDataAccounting() { DataTable dt = new DataTable(); dt.Columns.Add("id", typeof(int)); dt.Columns.Add("empno", typeof(string)); dt.Columns.Add("empname", typeof(string)); dt.Columns.Add("sex", typeof(bool)); dt.Columns.Add("wage", typeof(decimal)); dt.Columns.Add("birthday", typeof(DateTime)); dt.Rows.Add(1, "L0001", "涂聚文",false,4500,"1970-03-04"); dt.Rows.Add(2, "L0002", "刘杰", false, 4300, "1972-04-04"); dt.Rows.Add(3, "L0003", "宋承宪", false, 4500, "1974-04-04"); dt.Rows.Add(4, "L0005", "宁夏", false, 4500, "1973-04-04"); dt.Rows.Add(6, "L0009", "江东", true, 5500, "1975-04-04"); dt.Rows.Add(6, "L0010", "李燕云", true, 9500, "1976-04-04"); dt.Rows.Add(7, "L0020", "赵雅芝", false, 14500, "1977-04-04"); return dt; } /// <summary> /// 盘点数据 Inventory /// </summary> /// <returns></returns> DataTable setDataInventory() { DataTable dt = new DataTable(); dt.Columns.Add("id", typeof(int)); dt.Columns.Add("empno", typeof(string)); dt.Columns.Add("empname", typeof(string)); dt.Columns.Add("sex", typeof(bool)); dt.Columns.Add("wage", typeof(decimal)); dt.Columns.Add("birthday", typeof(DateTime)); dt.Rows.Add(10, "L0001", "涂聚文", false, 4500, "1970-03-04"); dt.Rows.Add(11, "L0002", "刘杰", false, 4300, "1972-04-04"); dt.Rows.Add(12, "L0009", "江东", true, 5500, "1973-04-04"); dt.Rows.Add(13, "L0010", "李燕云", true, 9500, "1974-04-04"); dt.Rows.Add(14, "L0020", "赵雅芝", false, 14500, "1975-04-04"); dt.Rows.Add(15, "L0032", "徐若萱", false, 4300, "1976-04-04"); dt.Rows.Add(16, "L0056", "保芝林", true, 4200, "1977-04-04"); dt.Rows.Add(17, "L0042", "何燕华", false, 4100, "1978-04-04"); dt.Rows.Add(18, "L0052", "黄花菜", false, 4400, "1979-04-04"); dt.Rows.Add(19, "L0012", "艾薇儿", true, 5500, "1982-04-04"); dt.Rows.Add(20, "L0018", "傅艺伟", false, 6500, "1932-04-04"); dt.Rows.Add(21, "L0028", "李世民", false, 9500, "1992-04-04"); return dt; } /// <summary> /// /// </summary> public Form1() { InitializeComponent(); } /// <summary> /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void Form1_Load(object sender, EventArgs e) { this.dataGridViewAccounting.DataSource = setDataAccounting(); this.dataGridViewInventory.DataSource = setDataInventory(); } /// <summary> /// 比结果 /// /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void button1_Click(object sender, EventArgs e) { try { DataTable datadiff1 = new DataTable(); DataTable datadiff2 = new DataTable(); DataTable dataOverage = new DataTable();//盘盈 DataTable dataInventoryLoss = new DataTable();//盘亏 DataTable datatable1 = setDataAccounting(); DataTable datatable2 = setDataInventory(); #region //var qry1 = datatable1.AsEnumerable().Select(a => new { MobileNo = a["empno"].ToString() }); //var qry2 = datatable2.AsEnumerable().Select(b => new { MobileNo = b["empno"].ToString() }); //var exceptAB = qry1.Except(qry2); //// //DataTable dtMisMatch = (from a in datatable1.AsEnumerable() // join ab in exceptAB on a["empno"].ToString() equals ab.MobileNo // select a).CopyToDataTable(); ////detect row deletes - a row is in datatable1 except missing from datatable2 //var exceptAB1 = qry1.Except(qry2); // dataInventoryLoss= (from a in datatable1.AsEnumerable() // join ab in exceptAB1 on a["empno"].ToString() equals ab.MobileNo // select a).CopyToDataTable(); ////detect row inserts - a row is in datatable2 except missing from datatable1 //var exceptAB2 = qry2.Except(qry1); // dataOverage = (from a in datatable2.AsEnumerable() // join ab in exceptAB2 on a["empno"].ToString() equals ab.MobileNo // select a).CopyToDataTable(); #endregion //CompareDataTable(setDataAccounting(), setDataInventory(), "empno","id", out dataOverage, out datadiff1, out datadiff2, out dataInventoryLoss); CompareLinQDataTable(setDataAccounting(), setDataInventory(), "empno", out dataOverage, out dataInventoryLoss); this.dataGridViewOverage.DataSource =dataOverage; this.dataGridViewInventoryLoss.DataSource = dataInventoryLoss; this.dataGridViewAdd.DataSource =datadiff1 ; this.dataGridViewDel.DataSource = datadiff2; } catch (Exception ex) { ex.Message.ToString(); } } /// <summary> /// 比较两个DataTableCompare数据（结构相同） /// 涂聚文 /// http://www.codeproject.com/Tips/344792/Compare-two-datatable-using-LINQ-Query /// </summary> /// <param name="datatable1"></param> /// <param name="datatable2"></param> /// <param name="keyField"></param> /// <param name="dataOverage"></param> /// <param name="dataInventoryLoss"></param> public static void CompareLinQDataTable(DataTable datatable1, DataTable datatable2, string keyField,out DataTable dataOverage,out DataTable dataInventoryLoss) { var qry1 = datatable1.AsEnumerable().Select(a => new { IdNo = a[keyField].ToString() }); var qry2 = datatable2.AsEnumerable().Select(b => new { IdNo = b[keyField].ToString() }); //detect row deletes - a row is in datatable1 except missing from datatable2 var exceptAB1 = qry1.Except(qry2); dataInventoryLoss = (from a in datatable1.AsEnumerable() join ab in exceptAB1 on a[keyField].ToString() equals ab.IdNo select a).CopyToDataTable(); //detect row inserts - a row is in datatable2 except missing from datatable1 var exceptAB2 = qry2.Except(qry1); dataOverage = (from a in datatable2.AsEnumerable() join ab in exceptAB2 on a[keyField].ToString() equals ab.IdNo select a).CopyToDataTable(); } /// <summary> /// 比较两个DataTableCompare数据（结构相同） /// 来源于:http://www.cnblogs.com/houlinbo/archive/2010/02/10/1667189.html /// </summary> /// <param name="dt1">来自数据库的DataTable</param> /// <param name="dt2">来自文件的DataTable</param> /// <param name="keyField">要比较的关键字段名</param> /// <param name="keyid">不需要比较的字段名id</param> /// <param name="dtRetAdd">新增数据（dt2中的数据）</param> /// <param name="dtRetDif1">不同的数据（数据库中的数据）</param> /// <param name="dtRetDif2">不同的数据（dt2中的数据,修改过的）</param> /// <param name="dtRetDel">删除的数据（dt2中的数据）</param> public static void CompareDataTable(DataTable dt1, DataTable dt2, string keyField,string keyid, out DataTable dtRetAdd, out DataTable dtRetDif1, out DataTable dtRetDif2,out DataTable dtRetDel) { //为三个表拷贝表结构 dtRetDel = dt1.Clone(); dtRetAdd = dtRetDel.Clone(); dtRetDif1 = dtRetDel.Clone(); dtRetDif2 = dtRetDel.Clone(); int colCount = dt1.Columns.Count; DataView dv1 = dt1.DefaultView; DataView dv2 = dt2.DefaultView; //先以第一个表为参照，看第二个表是修改了还是删除了 foreach (DataRowView dr1 in dv1) { dv2.RowFilter = keyField + " = '" + dr1[keyField].ToString() + "'"; if (dv2.Count > 0) { if (!CompareUpdate(dr1, dv2[0]))//比较是否有不同的 { dtRetDif1.Rows.Add(dr1.Row.ItemArray);//修改前 dtRetDif2.Rows.Add(dv2[0].Row.ItemArray);//修改后 dtRetDif2.Rows[dtRetDif2.Rows.Count - 1][keyid] = dr1.Row[keyid];//将ID赋给来自文件的表，因为它的ID全部==0 continue; } } else { //已经被删除的 dtRetDel.Rows.Add(dr1.Row.ItemArray); } } //以第一个表为参照，看记录是否是新增的 dv2.RowFilter = "";//清空条件 foreach (DataRowView dr2 in dv2) { dv1.RowFilter = keyField + " = '" + dr2[keyField].ToString() + "'"; if (dv1.Count == 0) { //新增的 dtRetAdd.Rows.Add(dr2.Row.ItemArray); } } } /// <summary> /// /// </summary> /// <param name="dr1"></param> /// <param name="dr2"></param> /// <returns></returns> private static bool CompareUpdate(DataRowView dr1, DataRowView dr2) { //行里只要有一项不一样，整个行就不一样,无需比较其它 object val1; object val2; for (int i = 1; i < dr1.Row.ItemArray.Length; i++) { val1 = dr1[i]; val2 = dr2[i]; if (!val1.Equals(val2)) { return false; } } return true; }
原标题：csharp:Compare two DataTables to rows in one but not the other
关键词：DataTable
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