Question

I want some help in copying certain columns from one dataset into another dataset in C#. The mapping for the columns is stored in the xml file.

Suppose I have a source dataset with columns –

calldate, 
percent, 
value

and a destination dataset with columns –

name,
amount

The mapping xml file has, columns from source dataset and destination column names. Exclude attribute helps in identifying if the column will be copied or not.
XML:

<data>
  <column name="calldate" destination="name" exclude="false" />
  <column name="percent" destination="" exclude="true" />
  <column name="value" destination="amount" exclude="false" />
</data>

How to copy the columns calldate and value from source dataset to name and amount columns of the destination dataset respectively? Note: the datatypes will be same – string and double. At this time I am not concerned about the xml part. I will take care of that once I figure out how to copy specific columns to respective column in the destination dataset.

Answer 1

For example if dt is the table you’re working with,

var newTable = new DataTable();
newTable.Columns.Add("name");
newTable.Columns.Add("amount");
foreach (var row as DataRow in dt.Rows) {
    newTable.Rows.Add(new object[] { row["calldate"], row["value"} });
}