DataTable already belongs to another DataSet

Question

This error is occuring while adding one datatable from a dataset to another .\"DataTable already belongs to another DataSet.\"

dsformulaValues.Tables.Add(m_D         


        

Answer 1

I found one turn around I hope it can help

_DataTable.TableName = _TableName
If _DataTable.DataSet IsNot Nothing Then
    _DataSet = _DataTable.DataSet
Else
    _DataSet = New DataSet
    _DataSet.Tables.Add(_DataTable)
End If

Somehow even if _DataTable is new, but if it refers to a previous loaded physical table it becomes that DataTable inheriting the previous configuration.

Answer 2

The accepted answer isn't very good. Cloning should always be a last option.

Here's a way around the problem without incurring the overhead of cloning.

        DataSet ds = GetData1();

        DataSet ds2 = GetData2();

        //Assuming you know you've got good data

            DataTable dt = ds2.Tables[0];
            ds2.Tables.Remove(dt);
            dt.TableName = "PortedTable";//you may need to change the table name to prevent conflicts
            ds.Tables.Add(dt);

Answer 3

dtCopy = dataTable.Copy()

ds.Tables.Add(dtCopy)

We can Optimize the code like :

ds.Tables.Add(dataTable.Copy());

Answer 4

The simple way is just merge the table as follows.

dsformulaValues.Merge(m_DataAccess.GetFormulaValues(dv.ToTable.DefaultView.ToTable(False, strSelectedCols)).Tables(0))