使用我的 SqlBuilder 类。它使您可以编写参数化查询,而无需创建参数,也不必担心它的名称。您的代码将如下所示...
var bldr = new SqlBuilder( myCommand );
bldr.Append("SELECT * FROM CUSTOMERS WHERE ID = ").Value(myId);
//or
bldr.Append("SELECT * FROM CUSTOMERS NAME LIKE ").FuzzyValue(myName);
myCommand.CommandText = bldr.ToString();
您的代码将更短且更具可读性。与串联查询相比,您甚至不需要额外的行。你需要的课在这里...
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
public class SqlBuilder
{
private StringBuilder _rq;
private SqlCommand _cmd;
private int _seq;
public SqlBuilder(SqlCommand cmd)
{
_rq = new StringBuilder();
_cmd = cmd;
_seq = 0;
}
public SqlBuilder Append(String str)
{
_rq.Append(str);
return this;
}
public SqlBuilder Value(Object value)
{
string paramName = "@SqlBuilderParam" + _seq++;
_rq.Append(paramName);
_cmd.Parameters.AddWithValue(paramName, value);
return this;
}
public SqlBuilder FuzzyValue(Object value)
{
string paramName = "@SqlBuilderParam" + _seq++;
_rq.Append("'%' + " + paramName + " + '%'");
_cmd.Parameters.AddWithValue(paramName, value);
return this;
}
public override string ToString()
{
return _rq.ToString();
}
}