1：存儲過程返回值

View Code public void InputOutputParameters()
{
AdoHelper ado = AdoHelper.CreateHelper(DbProvideType.MySql);

ado.ExecuteNonQuery(conn, CommandType.Text, "CREATE PROCEDURE spTest1( INOUT strVal VARCHAR(50), INOUT numVal INT, OUT outVal INT UNSIGNED ) " +
"BEGIN SET strVal = CONCAT(strVal,'ending'); SET numVal=numVal * 2; SET outVal=99; END");

IDataParameter[] param1 = new IDataParameter[]{
ado.GetParameter("numVal", DbType.Int32, ParameterDirection.InputOutput),
ado.GetParameter("strVal", DbType.String, ParameterDirection.InputOutput),
ado.GetParameter("outVal", DbType.UInt64, ParameterDirection.Output)
};
//存儲過程參數按照名稱對應
param1[1].Value = "beginning";
param1[0].Value = 32;
ado.ExecuteNonQuery(conn, CommandType.StoredProcedure, "spTest1", param1);
Console.ReadLine();
}

2：函數

View Code public void FunctionNoParams()
{
AdoHelper ado = AdoHelper.CreateHelper(DbProvideType.MySql);

ado.ExecuteNonQuery(conn, CommandType.Text, "CREATE FUNCTION fnTest() RETURNS CHAR(50)" +
" LANGUAGE SQL DETERMINISTIC BEGIN RETURN \"Test\"; END");

object obj = ado.ExecuteScalar(conn, CommandType.Text, "SELECT fnTest()");
Console.ReadLine();
} View Code public void CallingStoredFunctionasProcedure()
{
AdoHelper ado = AdoHelper.CreateHelper(DbProvideType.MySql);

ado.ExecuteNonQuery(conn, CommandType.Text, "CREATE FUNCTION fnTest1(valin int) RETURNS INT " +
" LANGUAGE SQL DETERMINISTIC BEGIN return valin * 2; END");

IDataParameter[] param1 = new IDataParameter[]{
ado.GetParameter("?rt", DbType.Int32, ParameterDirection.ReturnValue),
ado.GetParameter("valin", DbType.Int32, 16),
};
//Return 函數必須加？符號
object obj = ado.ExecuteScalar(conn, CommandType.StoredProcedure, "fnTest1", param1);
Console.ReadLine();
}

3：返回記錄集

View Code public void ReturningEmptyResultSet()
{
AdoHelper ado = AdoHelper.CreateHelper(DbProvideType.MySql);

ado.ExecuteNonQuery(conn, CommandType.Text, "CREATE TABLE test21 (id int AUTO_INCREMENT NOT NULL, " +
"Name VARCHAR(100) NOT NULL, PRIMARY KEY(id))");

ado.ExecuteNonQuery(conn, CommandType.Text, "CREATE TABLE test22 (id int AUTO_INCREMENT NOT NULL, " +
"id1 INT NOT NULL, id2 INT NOT NULL, PRIMARY KEY(id))");

ado.ExecuteNonQuery(conn, CommandType.Text, "INSERT INTO test21 (Id, Name) VALUES (1, 'Item1')");
ado.ExecuteNonQuery(conn, CommandType.Text, "INSERT INTO test21 (Id, Name) VALUES (2, 'Item2')");
ado.ExecuteNonQuery(conn, CommandType.Text, "INSERT INTO test22 (Id, Id1, Id2) VALUES (1, 1, 1)");
ado.ExecuteNonQuery(conn, CommandType.Text, "INSERT INTO test22 (Id, Id1, Id2) VALUES (2, 2, 1)");
ado.ExecuteNonQuery(conn, CommandType.Text, "CREATE PROCEDURE spTest2(Name VARCHAR(100), OUT Table1Id INT) " +
"BEGIN SELECT t1.Id INTO Table1Id FROM test21 t1 WHERE t1.Name LIKE Name; " +
"SELECT t3.Id2 FROM test22 t3 WHERE t3.Id1 = Table1Id; END");

IDataParameter[] param1 = new IDataParameter[]{
ado.GetParameter("Name", DbType.String, "Item2"),
ado.GetParameter("Table1Id", DbType.Int32, ParameterDirection.Output)
};
//Return 函數必須加？符號
using (DataSet ds = ado.ExecuteDataset(conn, CommandType.StoredProcedure, "spTest2", param1))
{
Console.ReadLine();
}

}

4：返回二進制

View Code public void BinaryAndVarBinaryParameters()
{
AdoHelper ado = AdoHelper.CreateHelper(DbProvideType.MySql);

ado.ExecuteNonQuery(conn, CommandType.Text, "CREATE PROCEDURE spTest3(OUT out1 BINARY(20), OUT out2 VARBINARY(20)) " +
"BEGIN SET out1 = 'out1'; SET out2='out2'; END");


IDataParameter[] param1 = new IDataParameter[]{
ado.GetParameter("out1", DbType.Object, ParameterDirection.Output),
ado.GetParameter("out2", DbType.Object, ParameterDirection.Output)
};

ado.ExecuteNonQuery(conn, CommandType.StoredProcedure, "spTest3", param1);
Console.ReadLine();
}

總結

1：MySql的存儲過程參數賦值是按照名稱對應的。

2：函數返回值的參數名稱需要額外增加符號?表示是變量。

總結

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