C# DataRow Empty-check

Question

I got this:

 DataTable dtEntity = CreateDataTable();
 drEntity = dtEntity.NewRow();

Then I add data to the row (or not). Lots of code, real

Answer 1

DataTable.NewRow will initialize each field to:

• the default value for each DataColumn (DataColumn.DefaultValue)

• except for auto-increment columns (DataColumn.AutoIncrement == true), which will be initialized to the next auto-increment value.

• and expression columns (DataColumn.Expression.Length > 0) are also a special case; the default value will depend on the default values of columns on which the expression is calculated.

So you should probably be checking something like:

bool isDirty = false;
for (int i=0; i 0) continue;
    if (table.Columns[i].AutoIncrement) continue;
    if (row[i] != table.Columns[i].DefaultValue) isDirty = true;
}

I'll leave the LINQ version as an exercise :)