Executereader to datatable

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WebGreg Smalter. 6,541 9 42 63. Without writing your implementation, IDataReader and/or DbDataReader and "GetStrongScalarType ( ordinalNumber ) is the faster. GetString, GetInt32, etc. and 0, 1, 2 or ordinal. At the end of the data, filling a DataTable or a DataSet or most ORM's are using IDataReader and/or DbDataReader, and using ordinal number.WebOct 18, 2016 · To answer your question, it returns SqlDataReader as stated in Msdn documentation - SqlCommand.ExecuteReader Method (). You can check documentation example for better understanding of ExecuteReader(). You have kinda turned this into an XY problem but for binding data to a GridView you should use a DataTable and a …

c# - DataTable not loading SqlDataReader - Stack …

WebJul 26, 2013 · 1.Pass datatable into the view. public ActionResult my () { con.Open (); SqlCommand cmd = new SqlCommand ("select * from table",con); SqlDataAdapter da = new SqlDataAdapter (cmd); DataTable dt = new DataTable (); da.Fill (dt); return View (dt); } 2.Accept the datatable in the view WebOct 7, 2024 · // Execute the DataReader and access the data. OdbcDataReader reader = command.ExecuteReader (); while (reader.Read ()) { Console.WriteLine ( "CustomerID= {0}", reader [0]); } // Call Close when done reading. reader.Close (); } } If you want to DataSet use OdbcDataAdapter. Refer to the following: theodore edgar mccarrick education

c# - Multiples Table in DataReader - Stack Overflow

WebOct 7, 2024 · If you want to DataSet use OdbcDataAdapter. Refer to the following: string queryString = "SELECT DISTINCT CustomerID FROM Orders"; using (OdbcConnection … Web我遇到了無法從數據庫中正確讀取數據的問題。舉個例子，我得到了數據庫6.69879289850025E-06中的重要值，但我在 C# 程序中讀取了6.0 （這不准確，因為它應該小得多）。. ImportantValue2 發生了類似的事情，其中數據庫中的值為 - 0,000158976621370616 ，在我的 C# 程序中我得到0,0 。 theodore ehmann

How to Deserialize datareader or data table to c# class

c# - DataReader to .CSV with column names - Stack Overflow

WebA good approach would be to use something like this: public async Task CallDb (string connStr, string sql) { var dt = new DataTable (); var connection = new SqlConnection (connStr); var reader = await connection.CreateCommand ().ExecuteReaderAsync (); dt.Load (reader); return dt; } GetData() { using …theodore eldridge deathWebMar 11, 2013 · dataSet.Load(reader, LoadOption.OverwriteChanges, customerTable, productTable); // Load the data into the DataTable. SqlDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection); DataTable dt = new DataTable(); dt.Load(dr); Share Follow answered Sep 13, 2011 at 12:30 alloc_iNitalloc_iNit theodore eftink cpa

"WebThere will be no advantage whatsoever in using dapper for a scenario involving DataSet. And in particular, your specific example (without any parameters etc) is so trivial (not meant negatively - simply objectively) that you might as well use … " - Executereader to datatable

Executereader to datatable

Convert a DataReader to DataTable in ASP.NET

WebYou can load a DataTable directly from a data reader using the Load () method that accepts an IDataReader. var dataReader = cmd.ExecuteReader (); var dataTable = new DataTable (); dataTable.Load (dataReader); Share Follow edited Sep 1, 2015 at 13:06 …WebOct 16, 2024 · While a DataReader is open, you can retrieve schema information about the current result set using the GetSchemaTable method. GetSchemaTable returns a DataTable object populated with rows and columns that contain the schema information for the current result set. The DataTable contains one row for each column of the result …

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WebApr 10, 2015 · When your database server and iis server is not same, network propagation time effect your performance. without datatable.Load, per row you get just one row from database server (for 1000 row, you have 1000* network propagation time), but by datatable.Load (IDatareader), for every read request (number of read request handle by … WebJul 11, 2024 · Well, one problem is that if .Net Core does not know about DataTable, then you can't return dt and everything else that would work with the DataTable won't work anymore. So the question is, what functionality of the DataTable do you really need, and can you use for example a DataReader for that instead (if DataReader is available in …

WebAug 31, 2011 · ExecuteReader. Do not use: when database query is going to provide for sure exactly 1 record. Use: when database query is going to provide a set of records. It … WebFeb 28, 2013 · You don't need to use a Data Reader, You could just Populate the Data into a DataTable, and use the below method to create a List of your CandidateApplication Class. The Call :-. List CandidateList = GetCandidateInformation (); The Method that generates the list :-. public List …

WebOct 26, 2015 · I am writing a function to read data from sql database, the function is as follows, public override Dictionary <string, dbdatareader>WebMar 24, 2012 · You can't directly fill a datatable from an SQL command - it would return a SqlDataReader, which is not the same thing, and can't be directly converted - you would have to create your own DataTable, assign the columns, and then loop through the reader manually converting rows to DataRows and adding them. Much more efficient (and …

WebSqlDataReader rdr = cmd.ExecuteReader(); while (rdr.Read()) { //how do I read strings here???? } I know that the reader has values. My SQL command is to select just 1 column from a table. The column contains strings ONLY. I want to read the strings (rows) in the reader one by one. How do I do this?

WebAug 2, 2016 · using (SqliteConnection dbCon = new SqliteConnection ("Data Source=" + Application.dataPath + "MainScoreDB.sqlite3")) { if (dbCon.State != ConnectionState.Open) dbCon.Open (); string query = "SELECT * FROM highscores"; SqliteCommand command = new SqliteCommand (query, dbCon); SqliteDataReader reader = …theodore edwards mdWebApr 18, 2008 · Note 1: If there is some existing data in the DataTable, the data coming from the DataReader is merged with the existing rows. Note 2: If you need a …theodore emelianovWebMar 11, 2024 · Using dataReader As SqlDataReader = command.ExecuteReader() 'new DataTable is created with customer information Dim customerTable As New DataTable("Customer") customerTable.Load(dataReader) 'Loading DataReader into the DataTable End Using conn.Close() End Using End Using End Sub In here, we use … theodore e levy investmentWeb我是MVC的新手並嘗試編寫一個簡單的MVC 應用程序，該應用程序在模型中的類中讀取客戶數據並使用控制器將其返回到視圖。 Reader顯示它有行但是當加載到表並傳遞給視圖作為模型時，它為null。我需要一個簡單的解決方案來傳遞DataTable來查看或DataReader來查看我可以轉換為DataTtheodore eidukasWebDataTable myTable = new DataTable(); myTable.Load(myCommand.ExecuteReader()); and then return DataTable to client. Share. Follow answered Nov 4, 2010 at 17:59. pyCoder pyCoder. 493 3 3 silver badges 9 9 bronze badges. 3. 1. This is a good idea if you only need a DataTAble and not the whole DataSet. theodore ellerWebCopy data from SqlDatareader to DataTable using Load function of DataTable. Ex. using ( SqlConnection conn = new SqlConnection (YourConnectionString)) { String sqlQuery = …theodore edwin wenkWebDec 17, 2015 · It turns out I was just overlooking something and this is actually not an issue at all. The original code actually works fine. The preview of the DataTable object when debugging shows {} and looked … theodore emmanuel contrôle bdv