标签:ice services exce 测试 output pen ble text png
DtatTable 在命名空间System.Data下,NetCore2.0及以上支持。但是2017DataTable没有可视化工具,我也没有深研究直接下载的VS2019。然后在网上早了个SQLHelper直接用上了。
示例代码:https://github.com/TengshengHou/NetCoreSample/tree/master/SQLHelperDemo
public class SQLHelper { IConfiguration _configuration; private string _connectionString; public SQLHelper(IConfiguration configuration) { _configuration = configuration; _connectionString = _configuration.GetConnectionString("DefaultConnection"); } public int ExecuteNonQuery(SqlConnection conn, string cmdText, SqlParameter[] cmdParms, SqlTransaction trans) { return ExecuteNonQuery(conn, CommandType.Text, cmdText, cmdParms, trans); } public int ExecuteNonQuery(SqlConnection conn, CommandType cmdType, string cmdText, SqlParameter[] cmdParms, SqlTransaction trans) { SqlCommand cmd = conn.CreateCommand(); int val = 0; using (cmd) { PrepareCommand(cmd, conn, trans, CommandType.Text, cmdText, cmdParms); val = cmd.ExecuteNonQuery(); cmd.Parameters.Clear(); } return val; } public SqlDataReader ExecuteReader(SqlConnection conn, CommandType cmdType, string cmdText, SqlParameter[] cmdParms) { SqlCommand cmd = conn.CreateCommand(); PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms); var rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection); return rdr; } public DataTable ExecuteDataTable(SqlConnection conn, CommandType cmdType, string cmdText, SqlParameter[] cmdParms) { System.Data.DataTable dt = new DataTable(); SqlCommand cmd = conn.CreateCommand(); PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms); System.Data.SqlClient.SqlDataAdapter da = new SqlDataAdapter(cmd); da.Fill(dt); return dt; } public object ExecuteScalar(SqlConnection conn, CommandType cmdType, string cmdText, SqlParameter[] cmdParms) { SqlCommand cmd = conn.CreateCommand(); PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms); object val = cmd.ExecuteScalar(); cmd.Parameters.Clear(); return val; } #region private private void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] commandParameters) { if (conn.State != ConnectionState.Open) { conn.Open(); } //cmd.Connection = conn; cmd.CommandText = cmdText; if (trans != null) { cmd.Transaction = trans; } cmd.CommandType = cmdType; //attach the command parameters if they are provided if (commandParameters != null) { AttachParameters(cmd, commandParameters); } } private void AttachParameters(SqlCommand command, SqlParameter[] commandParameters) { foreach (SqlParameter p in commandParameters) { //check for derived output value with no value assigned if ((p.Direction == ParameterDirection.InputOutput) && (p.Value == null)) { p.Value = DBNull.Value; } command.Parameters.Add(p); } } #endregion #region Default connection public DataTable ExecuteDataTable(string cmdText, SqlParameter[] cmdParms) { DataTable dataTable; using (var sqlConnection = GetDefaultSqlConnection()) { dataTable = this.ExecuteDataTable(sqlConnection, CommandType.Text, cmdText, cmdParms); } return dataTable; } public int ExecuteNonQuery(string cmdText, SqlParameter[] cmdParms) { int rowsAffected; using (var sqlConnection = GetDefaultSqlConnection()) { rowsAffected = ExecuteNonQuery(sqlConnection, cmdText, cmdParms, null); } return rowsAffected; } public object ExecuteScalar(string cmdText, SqlParameter[] cmdParms) { object retObj; using (var sqlConnection = GetDefaultSqlConnection()) { retObj = ExecuteScalar(cmdText, cmdParms); } return retObj; } #endregion public SqlConnection GetDefaultSqlConnection() { return new SqlConnection(_connectionString); } }
Startup->ConfigureServices
services.AddTransient(typeof(SQLHelper));
[Route("api/[controller]")] [ApiController] public class ValuesController : ControllerBase { SQLHelper _sqlHelper; public ValuesController(SQLHelper sqlHelper) { _sqlHelper = sqlHelper; } // GET api/values [HttpGet] public ActionResult<DataTable> Get() { return _sqlHelper.ExecuteDataTable("SELECT * FROM SYSUSER", null); } // GET api/update [HttpGet("update")] public ActionResult<int> Update() { SqlParameter[] cmdParms = new SqlParameter[] { new SqlParameter("@PASSWORD", DBNull.Value) }; return _sqlHelper.ExecuteNonQuery("UPDATE SYSUSER SET PASSWORD =@PASSWORD WHERE LOGINNAME=‘admin‘", cmdParms); } // GET api/update [HttpGet("UpdateTransaction")] public ActionResult<int> UpdateTransaction() { int rowsAffected = 0; SqlParameter[] cmdParms = new SqlParameter[] { new SqlParameter("@PASSWORD", "123456") }; using (var conn = _sqlHelper.GetDefaultSqlConnection()) { conn.Open(); var transaction = conn.BeginTransaction(); try { rowsAffected = _sqlHelper.ExecuteNonQuery(conn, "UPDATE SYSUSER SET PASSWORD =@PASSWORD WHERE LOGINNAME=‘admin‘", cmdParms, transaction); throw new Exception("test"); transaction.Commit(); } catch (Exception e) { transaction.Rollback(); throw e; } } return rowsAffected; } }
标签:ice services exce 测试 output pen ble text png
原文地址:https://www.cnblogs.com/hts92/p/11298813.html