Joint 2 datatable with column type double with a seperater

Question

Can anyone please tell me how to merge 2 datatable of column type double with a seperator (|). one with datetime header and 2nd table with integer headers, like this
table 1
01/02/2015   01/03/2015
  12346          47894
table 2
1               2
7899       45678
to become
01/02/2015        01/03/2015
12346 | 7899    47894 | 45678
thanks

Answer 1

Hi Sysaide,
According to your description, you'd like to migration the two dataTable to one.
What is the corresponding relationship of these two DataTables? Or when you migrating, the 01/02/2015 column and 1 column are fixed to one column. what is the relationship between these two columns?
Or, Does the first column of table1 correspond to the first column of table2? the second correspont to the second? ...
If the column index is corresponding each other. you could use the following way.
Getting out the value of each cell, then rebuild a new table to get this new value.
In your example, your column type is DataTime, but the value in the column is still string type. The below sample is used two different column type, string and int. And I show the result in a dataGridView.
DataTable dt1 = new DataTable();
dt1.Columns.Add("01/02/2015", typeof(string));
dt1.Columns.Add("01/03/2015", typeof(string));
DataRow dr = dt1.NewRow();
dr["01/02/2015"] = "11";
dr["01/03/2015"] = "12";
dt1.Rows.Add(dr);
dr = dt1.NewRow();
dr["01/02/2015"] = "21";
dr["01/03/2015"] = "22";
dt1.Rows.Add(dr);
DataTable dt2 = new DataTable();
dt2.Columns.Add("1", typeof(int));
dt2.Columns.Add("2", typeof(int));
DataRow dr2 = dt2.NewRow();
dr2["1"] = 1111;
dr2["2"] = 1122;
dt2.Rows.Add(dr2);
dr2 = dt2.NewRow();
dr2["1"] = 2211;
dr2["2"] = 2222;
dt2.Rows.Add(dr2);
DataTable dt = new DataTable();
dt = dt1.Clone();
for (int i = 0; i < dt1.Rows.Count; i++)
dt.Rows.Add();
for (int j = 0; j < dt1.Columns.Count; j++)
dt.Rows[i][j] = dt1.Rows[i][j].ToString() + " | " + dt2.Rows[i][j].ToString();
this.dataGridView1.DataSource = dt;
Result:
If you have any other concern regarding this issue, please feel free to let me know.
Best regards,
Youjun Tang
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