C#, Databound Datagridview showing wrong Data after inserting row programmatically

Question

I´m having a problem with a databound DataGridView:

I´m using a view including inner joins from an SQL-Server Database as Datasource. When I insert rows programmatically the Data is written correctly, but the DataGridView is not displaying the data it´s supposed to display.

Some of the Columns in the View are joined with another table. Basically I join ID-values in the main table with sub tables to be able to display the text value of the column instead. When I insert the rows containing the id values into the GridView, it displays the ID-value, but not the corresponding text value.

If I restart the program everything is displayed correctly. How do I update/refresh the GridView to show the correct text values? I´ve tried GridView.EndEdit() and GridView.Refresh(), rebindung the Datasource to the GridView and also have been searching the web without success.

Answer 1

使用您在第一页加载时使用的相同查询重新查询。

Answer 2

DataGridView.Refresh() is for a graphical refresh, not a data refresh. You need to rebind your data source after the update.

Set the data source to null after the insert: DataGridView.DataSource = null; and then rebind the data source by re-querying the data and applying the updated source DataGridView.DataSource = someSource , and finally call DataBind() once again.

It it's not performant enough for you, I might suggest limiting the number of rows returned in your result set, or applying some worthy indexes to your table(s).