/// <summary>
/// 访问SQL Server的通用数据访问类
/// </summary>
class SQLHelper
{
//定义连接字符串
private static readonly string connString =
ConfigurationManager.ConnectionStrings["connString"].ToString();
/// <summary>
/// 执行增删改操作
/// </summary>
/// <param name="sql"></param>
/// <returns></returns>
public static int Update(string sql)
{
SqlConnection conn = new SqlConnection(connString);
SqlCommand cmd = new SqlCommand(sql, conn);
try
{
conn.Open();
return cmd.ExecuteNonQuery();
}
catch(Exception ex)
{
//将异常信息写入日志
throw ex;
}
finally//最终一定会被执行的代码
{
conn.Close();
Sqlhelper to access sql server database based on ado.net
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Origin blog.csdn.net/qq_41617901/article/details/112060059
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