This Row already belongs to another table error when trying to add rows?

Question

I have a DataTable which has some rows and I am using the select to filter the rows to get a collection of DataRows which I then loop through using foreach and add it to ano

Answer 1

you can give some id to the columns and name it uniquely.

Answer 2

Try this:

DataTable dt = (DataTable)Session["dtAllOrders"];
DataTable dtSpecificOrders = dt.Clone();

DataRow[] orderRows = dt.Select("CustomerID = 2");

foreach (DataRow dr in orderRows)
{
    dtSpecificOrders.ImportRow(dr);
}

Answer 3

Why don't you just use CopyToDataTable

DataTable dt = (DataTable)Session["dtAllOrders"];
DataTable dtSpecificOrders = new DataTable();

DataTable orderRows = dt.Select("CustomerID = 2").CopyToDataTable();

Answer 4

You need to create a new Row with the values from dr first. A DataRow can only belong to a single DataTable.

You can also use Add which takes an array of values:

myTable.Rows.Add(dr.ItemArray)

Or probably even better:

// This works because the row was added to the original table.
myTable.ImportRow(dr);

// The following won't work. No data will be added or exception thrown.
var drFail = dt.NewRow()
drFail["CustomerID"] = "[Your data here]";
// dt.Rows.Add(row); // Uncomment for import to succeed.
myTable.ImportRow(drFail);

Answer 5

yourTable.ImportRow(dataRow);

It's because the row you're copying doesn't have the same TableName:

For example, try:

Table1.TableName = "Table1";
Table2.TableName = "Table2";

Answer 6

foreach (DataRow dr in dtSpecificOrders.rows)
{
   dtSpecificOrders.Rows.Add(dr.ItemArray); 
}