How to Extract Unique Values from a DataTable Column and Store Them in an Array?

Distinguishing Unique Rows in a DataTable and Assigning to an Array

Question:

A DataTable named Table1 within a dataset objds contains a column called ProcessName with repetitive data. How can you extract only the distinct names from this column and store them in an array?

Solution:

To obtain distinct values from a DataTable and store them in an array, utilize the DataView class:

DataView view = new DataView(table);
DataTable distinctValues = view.ToTable(true, "ProcessName", ...);

In this code:

• Create a DataView object (view) from the given DataTable (table).
• Use the ToTable method of the DataView to create a new DataTable (distinctValues) containing unique rows.
• Specify the column names ("ProcessName", ...) as parameters to ToTable to include in the distinct table.
• The resulting distinctValues DataTable contains only rows with distinct values in the specified columns.
• You can access the distinct names using a loop or by iterating over the distinctValues DataTable.

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