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Hello everyone,
I have to change the data in one of the fields in my table in access.
I use the update query.
but the query only deleting the old data from the table and not entering the new data with the foll code.
code:

C#
String esql = string.Format("update company_list SET company_name ='{0}' where company_name ='{1}'", edited_name, selected_name);
OleDbCommand myupdate = new OleDbCommand(esql, con);
myupdate = new OleDbCommand(esql, con);
myupdate.ExecuteNonQuery();



so, I try to change the code, but here, it says that @new_name must have a default value.
but how to set a default value

code:
SQL
using (OleDbCommand myupdate = con.CreateCommand())
             {
 myupdate.CommandText = "update company_list set company_name = @new_name where company_name = @old_name";
                 
                 myupdate.Parameters.AddWithValue("@new_name",edited_name);
                 myupdate.Parameters.AddWithValue("@old_name", selected_name);
                 
                 myupdate.ExecuteNonQuery();
}


Please help asap.
Posted
Updated 28-Mar-12 21:07pm
v2

Check the value of edited_name - it is probably blank or null, which is why it is complaining. And why the original, dangerous code deleted without replacing.
   
Comments
Monjurul Habib 30-Mar-12 4:49am
   
5!
edited_name is null or empty. Make sure that you really get the new name into that variable.
   

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