|
| 1 | +## Code samples |
| 2 | +### Open a database connection |
| 3 | +```C# |
| 4 | +var connectionString = "Data Source=myASEserver;Port=5000;Database=myDataBase;Uid=myUsername;Pwd=myPassword;"; |
| 5 | + |
| 6 | +using(var connection = new AseConnection(connectionString)) |
| 7 | +{ |
| 8 | + connection.Open(); |
| 9 | + |
| 10 | + // use the connection... |
| 11 | +} |
| 12 | +``` |
| 13 | + |
| 14 | +### Execute a SQL statement and read response data |
| 15 | +```C# |
| 16 | +var connectionString = "Data Source=myASEserver;Port=5000;Database=myDataBase;Uid=myUsername;Pwd=myPassword;"; |
| 17 | + |
| 18 | +using (var connection = new AseConnection(connectionString)) |
| 19 | +{ |
| 20 | + connection.Open(); |
| 21 | + |
| 22 | + using (var command = connection.CreateCommand()) |
| 23 | + { |
| 24 | + command.CommandText = "SELECT FirstName, LastName FROM Customer"; |
| 25 | + |
| 26 | + using (var reader = command.ExecuteReader()) |
| 27 | + { |
| 28 | + // Get the results. |
| 29 | + while (reader.Read()) |
| 30 | + { |
| 31 | + var firstName = reader.GetString(0); |
| 32 | + var lastName = reader.GetString(1); |
| 33 | + |
| 34 | + // Do something with the data... |
| 35 | + } |
| 36 | + } |
| 37 | + } |
| 38 | +} |
| 39 | +``` |
| 40 | + |
| 41 | +### Execute a SQL statement that returns no results |
| 42 | +```C# |
| 43 | +var connectionString = "Data Source=myASEserver;Port=5000;Database=myDataBase;Uid=myUsername;Pwd=myPassword;"; |
| 44 | + |
| 45 | +using (var connection = new AseConnection(connectionString)) |
| 46 | +{ |
| 47 | + connection.Open(); |
| 48 | + |
| 49 | + using (var command = connection.CreateCommand()) |
| 50 | + { |
| 51 | + command.CommandText = "INSERT INTO Customer (FirstName, LastName) VALUES ('Fred', 'Flintstone')"; |
| 52 | + |
| 53 | + var recordsModified = command.ExecuteNonQuery(); |
| 54 | + } |
| 55 | +} |
| 56 | +``` |
| 57 | + |
| 58 | +### Execute a SQL statement that returns a scalar value |
| 59 | +```C# |
| 60 | +var connectionString = "Data Source=myASEserver;Port=5000;Database=myDataBase;Uid=myUsername;Pwd=myPassword;"; |
| 61 | + |
| 62 | +using (var connection = new AseConnection(connectionString)) |
| 63 | +{ |
| 64 | + connection.Open(); |
| 65 | + |
| 66 | + using (var command = connection.CreateCommand()) |
| 67 | + { |
| 68 | + command.CommandText = "SELECT COUNT(*) FROM Customer"; |
| 69 | + |
| 70 | + var result = command.ExecuteScalar(); |
| 71 | + } |
| 72 | +} |
| 73 | +``` |
| 74 | + |
| 75 | +### Use input parameters with a SQL query |
| 76 | +Note: ASE only allows `Output`, `InputOutput`, and `ReturnValue` parameters with stored procedures |
| 77 | +```C# |
| 78 | +var connectionString = "Data Source=myASEserver;Port=5000;Database=myDataBase;Uid=myUsername;Pwd=myPassword;"; |
| 79 | + |
| 80 | +using (var connection = new AseConnection(connectionString) |
| 81 | +{ |
| 82 | + connection.Open(); |
| 83 | + |
| 84 | + using (var command = connection.CreateCommand()) |
| 85 | + { |
| 86 | + command.CommandText = "SELECT TOP 1 FirstName FROM Customer WHERE LastName = @lastName"; |
| 87 | + |
| 88 | + command.Parameters.AddWithValue("@lastName", "Rubble"); |
| 89 | + |
| 90 | + var result = command.ExecuteScalar(); |
| 91 | + } |
| 92 | +} |
| 93 | +``` |
| 94 | + |
| 95 | +### Execute a stored procedure and read response data |
| 96 | +```C# |
| 97 | +var connectionString = "Data Source=myASEserver;Port=5000;Database=myDataBase;Uid=myUsername;Pwd=myPassword;"; |
| 98 | + |
| 99 | +using (var connection = new AseConnection(connectionString) |
| 100 | +{ |
| 101 | + connection.Open(); |
| 102 | + |
| 103 | + using (var command = connection.CreateCommand()) |
| 104 | + { |
| 105 | + command.CommandText = "GetCustomer"; |
| 106 | + command.CommandType = CommandType.StoredProcedure; |
| 107 | + |
| 108 | + command.Parameters.AddWithValue("@lastName", "Rubble"); |
| 109 | + |
| 110 | + using (var reader = command.ExecuteReader()) |
| 111 | + { |
| 112 | + // Get the results. |
| 113 | + while (reader.Read()) |
| 114 | + { |
| 115 | + var firstName = reader.GetString(0); |
| 116 | + var lastName = reader.GetString(1); |
| 117 | + |
| 118 | + // Do something with the data... |
| 119 | + } |
| 120 | + } |
| 121 | + } |
| 122 | +} |
| 123 | +``` |
| 124 | + |
| 125 | +### Execute a stored procedure that returns no results |
| 126 | +```C# |
| 127 | +var connectionString = "Data Source=myASEserver;Port=5000;Database=myDataBase;Uid=myUsername;Pwd=myPassword;"; |
| 128 | + |
| 129 | +using (var connection = new AseConnection(connectionString)) |
| 130 | +{ |
| 131 | + connection.Open(); |
| 132 | + |
| 133 | + using (var command = connection.CreateCommand()) |
| 134 | + { |
| 135 | + command.CommandText = "CreateCustomer"; |
| 136 | + command.CommandType = CommandType.StoredProcedure; |
| 137 | + |
| 138 | + command.Parameters.AddWithValue("@firstName", "Fred"); |
| 139 | + command.Parameters.AddWithValue("@lastName", "Flintstone"); |
| 140 | + |
| 141 | + command.ExecuteNonQuery(); |
| 142 | + } |
| 143 | +} |
| 144 | +``` |
| 145 | + |
| 146 | +### Execute a stored procedure that returns a scalar value |
| 147 | +```C# |
| 148 | +var connectionString = "Data Source=myASEserver;Port=5000;Database=myDataBase;Uid=myUsername;Pwd=myPassword;"; |
| 149 | + |
| 150 | +using (var connection = new AseConnection(connectionString)) |
| 151 | +{ |
| 152 | + connection.Open(); |
| 153 | + |
| 154 | + using (var command = connection.CreateCommand()) |
| 155 | + { |
| 156 | + command.CommandText = "CountCustomer"; |
| 157 | + command.CommandType = CommandType.StoredProcedure; |
| 158 | + |
| 159 | + var result = command.ExecuteScalar(); |
| 160 | + } |
| 161 | +} |
| 162 | +``` |
| 163 | + |
| 164 | +### Use input, output, and return parameters with a stored procedure |
| 165 | +```C# |
| 166 | +var connectionString = "Data Source=myASEserver;Port=5000;Database=myDataBase;Uid=myUsername;Pwd=myPassword;"; |
| 167 | + |
| 168 | +using (var connection = new AseConnection(connectionString)) |
| 169 | +{ |
| 170 | + connection.Open(); |
| 171 | + |
| 172 | + using (var command = connection.CreateCommand()) |
| 173 | + { |
| 174 | + command.CommandText = "GetCustomerFirstName"; |
| 175 | + command.CommandType = CommandType.StoredProcedure; |
| 176 | + |
| 177 | + command.Parameters.AddWithValue("@lastName", "Rubble"); |
| 178 | + |
| 179 | + var outputParameter = command.Parameters.Add("@firstName", AseDbType.VarChar); |
| 180 | + outputParameter.Direction = ParameterDirection.Output; |
| 181 | + |
| 182 | + var returnParameter = command.Parameters.Add("@returnValue", AseDbType.Integer); |
| 183 | + returnParameter.Direction = ParameterDirection.ReturnValue; |
| 184 | + |
| 185 | + command.ExecuteNonQuery(); |
| 186 | + |
| 187 | + //Do something with outputParameter.Value and returnParameter.Value... |
| 188 | + } |
| 189 | +} |
| 190 | +``` |
| 191 | + |
| 192 | +### Execute a stored procedure and read response data with [Dapper](https://github.com/StackExchange/Dapper) |
| 193 | +```C# |
| 194 | +var connectionString = "Data Source=myASEserver;Port=5000;Database=myDataBase;Uid=myUsername;Pwd=myPassword;"; |
| 195 | + |
| 196 | +using (var connection = new AseConnection(connectionString)) |
| 197 | +{ |
| 198 | + connection.Open(); |
| 199 | + |
| 200 | + var barneyRubble = connection.Query<Customer>("GetCustomer", new {lastName = "Rubble"}, commandType: CommandType.StoredProcedure).First(); |
| 201 | + |
| 202 | + // Do something with the result... |
| 203 | +} |
| 204 | +``` |
0 commit comments