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"DataTable already belongs to this DataSet.

Posted on 2012-03-23
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Last Modified: 2012-03-23
HI,

when I add records to a datatable, I get the following error.

{"DataTable already belongs to this DataSet."}

code
 da.Fill(ds);
            //dt = ds.Tables[0];

            DataTable dt;
            dt = new DataTable("Sample");
            dt.Columns.Add("Id", typeof(integer));
            dt.Columns.Add("FName", typeof(string));
            dt.Columns.Add("LName", typeof(string));

            DataRow newDataRow;

            foreach (DataRow dr in ds.Tables[0].Rows)
            {
                newDataRow = dt.NewRow();
                newDataRow["Id"] = dr["Id"].ToString();
                newDataRow["FName"] = dr["FName"].ToString();
                newDataRow["LName"] = dr["LName"].ToString();
                dt.AcceptChanges();
                Tables.Add(dt); <--- error here
            }

How can I fix the problem?

please help.

ayha
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Question by:ayha1999
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2 Comments
 
LVL 44

Accepted Solution

by:
AndyAinscow earned 2000 total points
ID: 37756032
Take this line:
Tables.Add(dt); <--- error here
out of the foreach loop.
If you read the error message you shoiuld notice it is telling you the table is being added more than once
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LVL 7

Author Closing Comment

by:ayha1999
ID: 37756044
Thank you so much.
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