Question

我尝试了下面的代码，

ora.Open();
OracleCommand cmd = new OracleCommand() ;

cmd.Connection= ora;

cmd.CommandTimeout = 0;
cmd.CommandText = "update test set name= :name";
OracleParameter name = new OracleParameter("name", OracleDbType.Varchar2);
cmd.BindByName = true; 
name.Value = "test";
cmd.Parameters.Add(a);

cmd.ExecuteNonQuery();

ExecuteNonQuery不起作用且没有错误。怎么了？我使用Visual Studio 2012和Oracle Express 11g

Answer 1

您正在添加名为a的参数，而不是您创建的参数。试试这个：

ora.Open();
using (OracleCommand cmd = new OracleCommand())
{
   cmd.Connection = ora;
   cmd.BindByName = true; 

   cmd.CommandText = "update test set name = :name";
   OracleParameter name = new OracleParameter("name", OracleDbType.Varchar2);
   name.Value = "test";
   cmd.Parameters.Add(name); // add the name parameter, not "a" object.

   cmd.ExecuteNonQuery();
}

Answer 2

也许你错过了准备功能？

尝试添加在cmd.Prepare();

之后cmd.Parameters.Add(name);

Oracle更新命令无法正常工作

2 个答案: