SqlBulkCopy - The DestinationTableName property must be set before calling this method.

Problem

You execute the method WriteToServer, and the following error is thrown:

The DestinationTableName property must be set before calling this method.

// Oops! The destination name is empty
string destinationName = "";

using(var connection = new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()))
{
    connection.Open();
    using (var sqlBulk = new SqlBulkCopy(connection))
    {
        sqlBulk.DestinationTableName = destinationName;
        sqlBulk.WriteToServer(dt);
    }
}

Try it

Solution

Cause

• You never provided any value to the DestinationTableName property (empty by default).
• You provided an empty string to the DestinationTableName property.

Fix

• ENSURE you provide value to the DestinationTableName property.
• ENSURE the value you provided is not empty.

string destinationName = "Customers";

using(var connection = new SqlConnection(FiddleHelper.GetConnectionStringSqlServer()))
{
    connection.Open();
    using (var sqlBulk = new SqlBulkCopy(connection))
    {
        sqlBulk.DestinationTableName = destinationName;
        sqlBulk.WriteToServer(dt);
    }
}

Try it