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Tip of the Day
Language: .NET
Expertise: Intermediate
Aug 11, 2009

WEBINAR:

On-Demand

Application Security Testing: An Integral Part of DevOps


Determining Merge Errors in a Typed DataSet

Merging typed DataSets can cause a "Merge Constraint" error, which explains the problem, but doesn't help much in solving it. Here's how to find the exact cause of the error:

try
{
   //set Constrainsts check to false, so that the merge is fast.
   datasetOne.EnableConstraints = false;
   dbHelper.ExecuteDataSet(datasetOne, "dsOne", "spname");

   //Any error on merge will be caugt below
   datasetOne.Merge(datasetTwo);

   //set constrainsts check to true, so that we catch the exact error.
   datasetOne.EnableConstrainst = true;
}
catch (System.Data.DataException de)
{
   foreach (DataTable table in datasetOne.Tables)
   {
      foreach (DataRow row in table.GetErrors())
      {
         foreach (DataColumn column in row.GetColumnsInError())
         {
            //loop through each column in the row that has caused the error
            //during the bind and show it.
            string ErrorMessage = string.Format(
               "datasetOne bind failed due to Error : {0}"
               , row.GetColumnError(column));
            DataException dataException = new DataException(ErrorMessage, de);
            throw dataException;
         }
      }
   }
}
Srinath MS
 
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