Question

我想将名字和姓氏合并为＆＃34; name＆＃34;在datagridview中，我该怎么做？

我的代码..

private void frmPatient_Load(object sender, EventArgs e)
    {

        MySqlConnection con = new MySqlConnection("server = localhost; database = nuclinic; username = root; password = ; Convert Zero Datetime=True");

        string query = "select firstname, lastname from patient";

        using (MySqlDataAdapter adpt = new MySqlDataAdapter(query, con))
        {

            DataSet dset = new DataSet();

            adpt.Fill(dset);

            dataGridView1.DataSource = dset.Tables[0];

        }
        con.Close();
    }

我尝试了这段代码"SELECT firstname + ', ' + lastname AS name"; 但它不起作用

Answer 1

您只需使用MySQL CONCAT函数将两列和结果连接成一列，如名称所示。您可以使用它在网格视图中显示。

select   CONCAT(firstname,' ', lastname) as name, firstname, lastname from patient

Answer 2

替换

string query = "select firstname, lastname from patient";

使用此

string query = "select CONCAT(firstname," ",lastname) as FullName from Patient";

Concat功能将两个名称与空间分类

结合使用

AS FullName（列名称）返回列名

Answer 3

试试这个：

var hashPart = encodeURIComponent(btoa(JSON.stringify(obj)));
var url = 'http://my.website#/searchPage/' + hashPart;

// Decode the uri first
var decodedObj = JSON.parse(atob(decodeURIComponent(hashPart)));

希望这有帮助。

如何在1列datagridview中显示mysql数据库中的2个不同列

3 个答案: