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ExecuteReader(),ExecuteNonQuery(),ExecuteScalar(),ExecuteXmlReader...
ExecuteReader(),ExecuteNonQuery(),ExecuteScalar(),ExecuteXmlReader()之間的區(qū)別 主要有這么幾種,cmd.ExecuteReader();cmd.ExecuteNonQuery();cmd.ExecuteScalar();cmd.ExecuteXmlReader();) 1,ExecuteReader();返回一個(gè)SqlDataReader對(duì)象或
www.dbjr.com.cn/article/14...htm 2025-5-26
c#中executereader執(zhí)行查詢示例分享_C#教程_腳本之家
ExecuteReader執(zhí)行查詢實(shí)例 ExecuteReader方法存在的目的只有一個(gè):盡可能快地對(duì)數(shù)據(jù)庫進(jìn)行查詢并得到結(jié)果。ExecuteReader 返回一個(gè)DataReader對(duì)象:如果在SqlCommand對(duì)象中調(diào)用,則返回SqlDataReader;如果在OleDbCommand對(duì)象中調(diào)用,返回的是OleDbDataReader。可以調(diào)用DataReader的方法和屬性迭代處理結(jié)果集。它是一個(gè)快速枚舉數(shù)據(jù)庫查詢...
www.dbjr.com.cn/article/486...htm 2025-6-8
Access數(shù)據(jù)庫提示OleDbException (0x80004005): 操作必須使用一個(gè)可更新...
System.Data.OleDb.OleDbCommand.ExecuteCommand(CommandBehavior behavior, Object& executeResult) +48 System.Data.OleDb.OleDbCommand.ExecuteReaderInternal(CommandBehavior behavior, String method) +106 System.Data.OleDb.OleDbCommand.ExecuteNonQuery() +108 JetAccess.Execute(OleDbParameter[] parameters, String sqlstr)...
www.dbjr.com.cn/article/272...htm 2025-5-29
淺談Scala的Class、Object和Apply()方法_Scala_腳本之家
Scala小程序詳解及實(shí)例代碼 Windows7下安裝Scala 2.9.2教程 PHP警告Cannot use a scalar value as an array的解決方法 php下關(guān)于Cannot use a scalar value as an array的解決辦法 ExecuteReader(),ExecuteNonQuery(),ExecuteScalar(),ExecuteXmlReader()之間的區(qū)別 scala中停止循環(huán)的三種方式(推薦)微信...
www.dbjr.com.cn/article/1146...htm 2025-5-20
C#使用SqlBulkCopy批量復(fù)制數(shù)據(jù)到數(shù)據(jù)表_C#教程_腳本之家
commandSourceData.ExecuteReader(); // Open the destination connection. In the real world you would // not use SqlBulkCopy to move data from one table to the other // in the same database. This is for demonstration purposes only.
www.dbjr.com.cn/article/567...htm 2025-6-4
C#操作SQLite數(shù)據(jù)庫方法小結(jié)_C#教程_腳本之家
SQLiteDataReader reader = command.ExecuteReader(); while (reader.Read()) Console.WriteLine("Name: " + reader["name"] + "\tScore: " + reader["score"]); Console.ReadLine(); } } } 到此這篇關(guān)于C#操作SQLite數(shù)據(jù)庫的文章就介紹到這了。希望對(duì)大家的學(xué)習(xí)有所幫助,也希望大家多多支持腳本之家。
www.dbjr.com.cn/article/2507...htm 2025-6-2
C#使用開源驅(qū)動(dòng)連接操作MySQL數(shù)據(jù)庫_C#教程_腳本之家
//MySQLDataReader dr = com.ExecuteReaderEx();//執(zhí)行 ExecuteReaderEx() 返回的才是 MySQLDataReader DbTransaction trans = conn.BeginTransaction(); //開啟事物 try { //com.ExecuteNonQuery(); //還要執(zhí)行更多的語句時(shí)應(yīng)使用事物 Console.WriteLine(com.ExecuteScalar().ToString()); ...
www.dbjr.com.cn/article/612...htm 2025-6-7