在C#中,使用SqlDataAdapter时,为了避免数据冲突,可以采取以下几种策略:
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
using (SqlTransaction transaction = connection.BeginTransaction())
{
try
{
// 执行第一个SQL操作
SqlCommand command1 = new SqlCommand("INSERT INTO Table1 (Column1) VALUES (@Value1)", connection, transaction);
command1.Parameters.AddWithValue("@Value1", value1);
command1.ExecuteNonQuery();
// 执行第二个SQL操作
SqlCommand command2 = new SqlCommand("UPDATE Table2 SET Column2 = @Value2 WHERE Column3 = @Value3", connection, transaction);
command2.Parameters.AddWithValue("@Value2", value2);
command2.Parameters.AddWithValue("@Value3", value3);
command2.ExecuteNonQuery();
// 提交事务
transaction.Commit();
}
catch (Exception ex)
{
// 发生异常时回滚事务
transaction.Rollback();
throw ex;
}
}
}
string query = "SELECT * FROM Table1 WHERE Column1 = @Value1";
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
using (SqlCommand command = new SqlCommand(query, connection))
{
command.Parameters.AddWithValue("@Value1", value1);
using (SqlDataReader reader = command.ExecuteReader())
{
// 处理查询结果
}
}
}
string query = "DECLARE @OutputValue INT; EXEC YourStoredProcedure @InputValue, @OutputValue OUTPUT";
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
using (SqlCommand command = new SqlCommand(query, connection))
{
command.Parameters.AddWithValue("@InputValue", inputValue);
command.Parameters.Add(new SqlParameter("@OutputValue", SqlDbType.Int) { Direction = ParameterDirection.Output });
command.ExecuteNonQuery();
// 获取输出参数的值
int outputValue = (int)command.Parameters["@OutputValue"].Value;
}
}
通过采取这些策略,可以有效地避免在使用SqlDataAdapter时出现数据冲突的问题。
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