Dataadapter not updating
I have tried to get various combinations of setting parameters and update commands to work, but the Database is not getting updated from the new Data Table values. I am hoping someone can tell me what it is I am doing wrong/missing, or what is the correct path to take.I have stepped through the code with each change and can see that the Data Table is getting the new textbox values, but those updates aren’t going to the Database. Is there a "best practice" or a better way to do this?However, I am now running into a more complex scenario and I need to use dataadapter. I am then binding the dataset to a datagrid control that allows the user the option to edit the datagrid, which in turn updates the dataset.Update Command method and I'm having lots of problems. So that being said how do I get the updated dataset back into the database?
This allows you to maximize the performance of your ADO.
(This is seen when the Fill_Date block runs and selects all new data from the database.) Things I’ve tried: Letting the binding get the new values vs. Using the command builder to build the update command, using the . The issue was that the Data Table was not ending the edit, so the updates were not going to the Data Adapter. End Edit() will confirm the updates so they get updated on the database.
The fix is to bind the data to Binding Source and then bind the controls and DGV to the Binding Source.
The reason for this is depending on how you you merge Data Sets or add rows to a Data Set the Identity column will have a place holder. Those are not replicated down to the Data Sets so we have to do this manually. Add(Parent Constraints); Pay attention to the Update Rule setting for the Foreign Key constraint. Foreign Key Constraint Parent FK = new Foreign Key Constraint("IDFK", My Data Set. This is not very efficient if you have multiple tables that need to be updated. This is very easy using the Merge method in your Destination Data Set, New Data being the Data Set I want to merge into my existing data. Add); Our Data Sets are now merged and ready to be Updated in the new location. The only thing to remember is that the Identity column is marked as Read Only, therefore you can't update it without first changing it.
This place holder will not necessarily be the same value as what the database will contain. The Unique constraint Unique Constraint Parent Constraints = new Unique Constraint(new Data Column ); My Data Set. In that case wrap the below foreach loop in another foreach loop to iterate through each table.foreach (Data Row row in New Data. You have to set preserve Changes to true or the Merge will throw out all your changes and nothing will make it into the new database. Sql Command Builder Parent Command Builder = new Sql Command Builder(Parent Adapter); Sql Command Builder Child Command Builder = new Sql Command Builder(Child Adapter); My Data Set.