c#

1.MySql连接

  <connectionStrings>
  <add name="mysql" connectionString="server=localhost;port=3306;user id=zzzili;password=zzzili123;database=zzzili;CharSet=gb2312;" providerName="MySql.Data.MySqlClient"/>
  </connectionStrings>
 private string mysqlYunfeng = System.Configuration.ConfigurationManager.ConnectionStrings["mysql"].ConnectionString;

2.数据操作

         using (MySqlDataReader dr = MySqlHelper.ExecuteReader(mysqlYunfeng, sql))
         {

             if (dr.HasRows == true)
             {
                 while (dr.Read())
                 {
                     if (dr[0].ToString() == "Logo")
                     {
                         node.LogoVersion = dr[1].ToString();
                     }
                     else if (dr[0].ToString() == "City")
                     {
                         node.CityVersion = dr[1].ToString();
                     }
                 }
             }
         }

MySqlParameter[] paras = new MySqlParameter[4];
           paras[0] = new MySqlParameter("@stuNum",stuNum);
           paras[1] = new MySqlParameter("@answer",answer);
           paras[2] = new MySqlParameter("@score",score);
           paras[3] = new MySqlParameter("@exid",ex_id);

3.Json序列化

        //JavaScriptSerializer类在System.Web.Extensions.dll中，注意添加这个引用
        JavaScriptSerializer serializer = new JavaScriptSerializer();
        //JSON序列化
        string result = serializer.Serialize(node);

4.Request.QueryString[""].ToString();

5.输出调试信息

System.Diagnostics.Debug.WriteLine(returnStr);

6.sql中的判断

select  case when a>b  then a 
              when b>c then b 
        esle c   end
from table_name
where ...

7.web Table写入Excel

protected void Button1_Click(object sender, EventArgs e)
        {
            BndTableList(this.txtTime.Text, null);
            StringBuilder tstr = new StringBuilder();
            foreach (TableRow row in Table1.Rows)
            {
                foreach (TableCell cell in row.Cells)
                {
                    tstr.AppendFormat("{0}	",cell.Text);
                }
                tstr.Append("\r\n");
            }
            WriteFile(tstr.ToString());
        }

        private void WriteFile(string str)
        {
            System.IO.File.WriteAllText("C:\\upload\\aaa.xls", str, Encoding.UTF8);
        }

8.方法不在Swagger文档中显示

[HttpPost]
[ApiExplorerSettings(IgnoreApi = true)]
public void Test(){
//*************
}

文章来源: zzzili.blog.csdn.net，作者：清雨小竹，版权归原作者所有，如需转载，请联系作者。

原文链接：zzzili.blog.csdn.net/article/details/19191483