两个 DataTable 读取重复数据,dataTable1与dataTable2不同
- protected void Page_Load(object sender, EventArgs e)
- {
- DataTable dt = new DataTable();
- dt.Columns.Add("col");
- for (int i = 5; i >0;i=i-2)
- {
- DataRow row = dt.NewRow();
- row["col"] = "车" + i;
- dt.Rows.Add(row);
- }
- DataTable dt1 = new DataTable();
- dt1.Columns.Add("col1");
- for (int i = 1; i <= 4; i++)
- {
- DataRow row = dt1.NewRow();
- row["col1"] = "车" + i;
- dt1.Rows.Add(row);
- }
- DataTable resultTable = cf(dt,dt1);
- Response.Write("重复:");
- for (int i = 0; i < resultTable.Rows.Count; i++)
- Response.Write(resultTable.Rows[i]["col"].ToString());
- Response.Write("<br/>");
- resultTable = bcfbyd1tod2(dt, dt1);
- Response.Write("不重复 d1tod2:");
- for (int i = 0; i < resultTable.Rows.Count; i++)
- Response.Write(resultTable.Rows[i]["col"].ToString());
- Response.Write("<br/>");
- resultTable = bcfbyd2tod1(dt, dt1);
- Response.Write("不重复 d2tod1:");
- for (int i = 0; i < resultTable.Rows.Count; i++)
- Response.Write(resultTable.Rows[i]["col"].ToString());
- Response.Write("<br/>");
- }
- /// <summary>
- /// 取重复
- /// </summary>
- /// <param name="dt"></param>
- /// <param name="dt1"></param>
- /// <returns></returns>
- private DataTable cf(DataTable dt, DataTable dt1)
- {
- DataTable myTable = dt.Clone();
- for (int i = 0; i < dt.Rows.Count; i++)
- {
- DataRow[] sRow= dt1.Select("col1='"+dt.Rows[i]["col"].ToString()+"'");
- if (sRow.Length > 0)
- {
- DataRow row= myTable.NewRow();
- row["col"] = dt.Rows[i]["col"].ToString();
- myTable.Rows.Add(row);
- }
- }
- return myTable;
- }
- /// <summary>
- /// 不重复d1tod2
- /// </summary>
- /// <param name="dt"></param>
- /// <param name="dt1"></param>
- /// <returns></returns>
- private DataTable bcfbyd1tod2(DataTable dt, DataTable dt1)
- {
- DataTable myTable = dt.Clone();
- for (int i = 0; i < dt.Rows.Count; i++)
- {
- DataRow[] sRow = dt1.Select("col1='" + dt.Rows[i]["col"].ToString() + "'");
- if (sRow.Length == 0)
- {
- DataRow row = myTable.NewRow();
- row["col"] = dt.Rows[i]["col"].ToString();
- myTable.Rows.Add(row);
- }
- }
- return myTable;
- }
- /// <summary>
- /// 不重复d1tod2
- /// </summary>
- /// <param name="dt"></param>
- /// <param name="dt1"></param>
- /// <returns></returns>
- private DataTable bcfbyd2tod1(DataTable dt, DataTable dt1)
- {
- DataTable myTable = dt.Clone();
- for (int i = 0; i < dt1.Rows.Count; i++)
- {
- DataRow[] sRow = dt.Select("col='" + dt1.Rows[i]["col1"].ToString() + "'");
- if (sRow.Length == 0)
- {
- DataRow row = myTable.NewRow();
- row["col"] = dt1.Rows[i]["col1"].ToString();
- myTable.Rows.Add(row);
- }
- }
- return myTable;
- }
- http://blog.csdn.net/yeness/article/details/7817032
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