将第一个数据表的行与第二个数据表的列进行比较，并使用匹配的列构建第三个数据表

Question

http://www.codeproject.com/Questions/733071/Compare-Row-of-1st-Datatable-with-Column-of-2nd-Da (Understand the question) THESE ARE MY TWO DATATABLES (visual c#)

table1

|Par Name.........| Par #|.......Units |.......LSL  |   USL | -----SKIP |
Diffusion.........908513100.......-..........  0  -----99.9  -----1 
Program...........908514100.......-.........  99.5--- 999    -----





table2
starttime   | Product      | Device   | Diffusion       | Program | 
11/7/2013    SAF5100EL       163       -0.145712003      -0.146583006                                 
11/7/2013    SAF5100EL        84       -0.137499005      -0.137592003
11/7/2013    SAF5100EL        44       -0.142690003      -0.143250003  
11/7/2013    SAF5100EL       164       -0.139434993      -0.140459001
11/7/2013    SAF5100EL        34       -0.147183999      -0.148519993

output should look like

table3 
  |Diffusion|       | Program |
 -0.145712003      -0.146583006
 -0.137499005      -0.137592003
 -0.142690003      -0.143250003
 -0.139434993      -0.140459001
 -0.147183999      -0.148519993

here the columns in table2 which match the row names of table1(for instance here diffusion and program) have to be fetched from datatable2 and new DataTable3 has to be created and with sorted values of columns (Diffusion and Program)

Answer 1

As others have said, this is straight forward logic and that you should try it yourself first. This will give you confidence as well.

Anyways, the following code should do the trick. Tweek it as per your convenience. Also test it thoroughly.

//dt1 contains Diffusion etc as rows
//dt2 contains diffusion etc as columns
//dt3 is the required table
DataTable dt3 = new DataTable();
DataRow dr = null;

for (int i = 0; i < dt1.Rows.Count; i++)
{
    string col = dt1.Rows[i]["Par Name"].ToString();
    if (dt2.Columns.Contains(col))
    {
        if (!dt3.Columns.Contains(col))
        {
            dt3.Columns.Add(col, typeof(string));
        }

        if (dt3.Rows.Count == 0)
        {
            for (int j = 0; j < dt2.Rows.Count; j++)
            {
                dr = dt3.NewRow();
                dt3.Rows.Add(dr);
            }
        }

        for (int j = 0; j < dt2.Rows.Count; j++)
        {
            dt3.Rows[j][col] = dt2.Rows[j][col].ToString();
        }
    }
}

Hope this helps.