ExecuteReader是一个扩展方法,可以从IDbConnection类型的任意对象中调用。它可以执行查询并将结果映射到不同类型的列表。 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 string sql = "SELECT * FROM Invoice;"; using (var connection = My...
ExecuteReader("select * from Shapes")) { // Generate a row parser for each type you expect. // The generic type <IShape> is what the parser will return. // The argument (typeof(*)) is the concrete type to parse. var circleParser = reader.GetRowParser<IShape>(typeof(Circle)); ...
However when executing huge queries you may need to minimize memory footprint and only load objects as needed. To do so pass, buffered: false into the Query method. 我不确定如何将结果转换为列表来实现这一点。我错过了什么吗?我唯一的想法是,它应该将ExecuteReader的CommandBehavior设置为CommandBehavior....
conn)) {using(SqlDataReader dr =cmd.ExecuteReader(CommandBehavior.CloseConnection)) {while(dr.Read()) { list.Add(dr["TABLE_NAME"].ToString()); } } }returnlist; }
public static class DemoExtension { public static IEnumerableQuery(this IDbConnection cnn, string sql) { using (var command = cnn.CreateCommand()) { command.CommandText = sql; using (var reader = command.ExecuteReader()) { while (reader.Read()) { yield return reader.CastToDynamic(); } } ...
样本代码: public static void ExecuteSQL(ClickHouseConnection connection, string sql) { using (var reader = connection.CreateCommand(sql).ExecuteReader()) { do { while (reader.Read() 浏览3提问于2017-08-22得票数 1 回答已采纳 1回答 Dapper .net多重查询“读取器已被处理”错误 、、 我编写了返回...
public static IEnumerable Query(this IDbConnection cnn, string sql) { using (var command = cnn.CreateCommand()) { command.CommandText = sql; using (var reader = command.ExecuteReader()) { while (reader.Read()) { yield return reader.CastToDynamic(); ...
publicstaticclassDemoExtension{publicstaticIEnumerable<dynamic>Query(this IDbConnection cnn,stringsql){ using (var command = cnn.CreateCommand()) { command.CommandText = sql; using (var reader = command.ExecuteReader()) {while(reader.Read()) ...
ExecuteReader("select * from Shapes")) { // Generate a row parser for each type you expect. // The generic type <IShape> is what the parser will return. // The argument (typeof(*)) is the concrete type to parse. var circleParser = reader.GetRowParser<IShape>(typeof(Circle)); ...
public static IEnumerable Query(this IDbConnection cnn, string sql) { using (var command = cnn.CreateCommand()) { command.CommandText = sql; using (var reader = command.ExecuteReader()) { while (reader.Read()) { yield return reader.CastToDynamic(); ...