ado.net

private void Form1_Load(object sender, EventArgs e) For what purposes in the object sender, EventArgs parameter? using Syst ... // добавить созданный столбец в коллекцию Columns таблицы } } } }

How many times have I not read the msdn and did not understand why when filling in the datagridview to register also SqlDataA ... and DataTable is not enough? Maybe the question is stupid, but I want to understand and not just write code that would work.

Good day, dear forumchane. There was a question about working with the Oracle Database from Visual Studio 2013 (C#). When tr ... ary to Data Source=WorkTest ... oh, thank you so much to everyone who helped). The issue is resolved, the project has passed)

Following the recommendation that @Maniero made in this question I decided to parameterize the queries SQL of my program. Se ... t. cnxCli.selCmd.Parameters["@Nome"].Value = "%"+ txtNome.Text + "%"; I particularly found it pretty weird, but it worked.

I'm trying to read a file .dbf following a tutorial I saw on the Macoratti website (obs. I think everyone knows). And when ru ... from a .xls. Series is a problem? What happens? Is there something in the code, maybe in the connection string that is wrong?

I made a command because of foreign keys, just to plug hole, but it is not working by an invalid character error, I believe i ... { var erro = e.Message; return "Erro"; } } The error: ORA-00911: invalid character\n

Today I use a method that sends a COUNT with the record Id as a parameter to the database. Is there a better, perhaps more performative way to do this?

I'm starting to learn about C# for Web applications, and wanted to know what is the ADO.NET and what are the advantages of using it?

I would like to know how to retrieve a date as data from the milliseconds written to an MS SQL Server 2019 database using the ... MyBase.StrComando.AppendLine(" FROM tblHistorico ") Return MyBase.RetornaLista(StrComando.ToString()) End Function