本文整理汇总了C#中MySqlCommand.CreateParameter方法的典型用法代码示例。如果您正苦于以下问题：C# MySqlCommand.CreateParameter方法的具体用法？C# MySqlCommand.CreateParameter怎么用？C# MySqlCommand.CreateParameter使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类MySqlCommand的用法示例。
在下文中一共展示了MySqlCommand.CreateParameter方法的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: AddingParameterPreviouslyRemoved
public void AddingParameterPreviouslyRemoved()
{
MySqlCommand cmd = new
MySqlCommand("Insert into sometable(s1, s2) values(?p1, ?p2)");
MySqlParameter param1 = cmd.CreateParameter();
param1.ParameterName = "?p1";
param1.DbType = DbType.String;
param1.Value = "Ali Gel";
cmd.Parameters.Add(param1);
cmd.Parameters.RemoveAt(0);
cmd.Parameters.Add(param1);
}示例2: CallingStoredFunctionasProcedure
public void CallingStoredFunctionasProcedure()
{
if (Version < new Version(5, 0)) return;
execSQL("CREATE FUNCTION fnTest(valin int) RETURNS INT " +
" LANGUAGE SQL DETERMINISTIC BEGIN return valin * 2; END");
MySqlCommand cmd = new MySqlCommand("fnTest", conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("?valin", 22);
MySqlParameter retVal = cmd.CreateParameter();
retVal.ParameterName = "?retval";
retVal.MySqlDbType = MySqlDbType.Int32;
retVal.Direction = ParameterDirection.ReturnValue;
cmd.Parameters.Add(retVal);
if (prepare) cmd.Prepare();
cmd.ExecuteNonQuery();
Assert.AreEqual(44, cmd.Parameters[1].Value);
}示例3: UnTypedParameterBeingReused
public void UnTypedParameterBeingReused()
{
MySqlCommand cmd = new MySqlCommand("INSERT INTO Test (id, dt) VALUES (?id, ?dt)", conn);
cmd.Parameters.AddWithValue("?id", 1);
MySqlParameter p = cmd.CreateParameter();
p.ParameterName = "?dt";
p.Value = DBNull.Value;
cmd.Parameters.Add(p);
cmd.ExecuteNonQuery();
cmd.Parameters[0].Value = 2;
p.Value = DateTime.Now;
cmd.ExecuteNonQuery();
cmd.CommandText = "SELECT * FROM Test";
cmd.Parameters.Clear();
using (MySqlDataReader reader = cmd.ExecuteReader())
{
reader.Read();
Assert.IsTrue(reader.IsDBNull(2));
reader.Read();
Assert.IsFalse(reader.IsDBNull(2));
Assert.IsFalse(reader.Read());
}
}示例4: UsingUInt64AsParam
public void UsingUInt64AsParam()
{
if (Version < new Version(5, 0)) return;
execSQL(@"CREATE TABLE Test(f1 bigint(20) unsigned NOT NULL,
PRIMARY KEY(f1)) ENGINE=InnoDB DEFAULT CHARSET=utf8");
execSQL(@"CREATE PROCEDURE spTest(in _val bigint unsigned)
BEGIN insert into Test set f1=_val; END");
DbCommand cmd = new MySqlCommand();
cmd.Connection = conn;
cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = "spTest";
DbParameter param = cmd.CreateParameter();
param.DbType = DbType.UInt64;
param.Direction = ParameterDirection.Input;
param.ParameterName = "?_val";
ulong bigval = long.MaxValue;
bigval += 1000;
param.Value = bigval;
cmd.Parameters.Add(param);
cmd.ExecuteNonQuery();
}示例5: PreparedReader
public void PreparedReader()
{
if (Version < new Version(5, 0)) return;
execSQL("CREATE TABLE Test (id int(10) unsigned NOT NULL default '0', " +
"val int(10) unsigned default NULL, PRIMARY KEY (id)) " +
"ENGINE=InnoDB DEFAULT CHARSET=utf8");
execSQL("CREATE PROCEDURE spTest (IN pp INTEGER) " +
"select * from Test where id > pp ");
MySqlCommand c = new MySqlCommand("spTest", conn);
c.CommandType = CommandType.StoredProcedure;
IDataParameter p = c.CreateParameter();
p.ParameterName = "?pp";
p.Value = 10;
c.Parameters.Add(p);
c.Prepare();
using (MySqlDataReader reader = c.ExecuteReader())
{
while (reader.Read())
{
}
}
}