Posts by Jessf • 23 points
3 posts
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1
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answer439
viewsQ: Return DB value in a variable
I am trying to return the largest ID of the table Orcamento in a variable, but it returns me an error: An unhandled Exception of type 'System.Nullreferenceexception' occurred in Mysql.Data.dll.…
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answer922
viewsQ: Error: Validation failed for one or more entities. See 'Entityvalidationerrors' Property for more Details
The following error occurs when I try to insert data into the system: Validation failed for one or more entities. See 'Entityvalidationerrors' Property for more Details. It turns out that the…
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answer1397
viewsQ: Does not insert lines in Datagridview
I make a select in my database and it brings the values in the datagrid. However when I try to add/delete lines, it gives error: It is not possible to add lines programmatically to the Datagridview…