C# 需要将 sql 中的数据放入 DataGridView 并在行中按日期排序

Posted 2023-04-12

【中文标题】C# 需要将 sql 中的数据放入 DataGridView 并在行中按日期排序

【英文标题】：C# Need to put data from sql into DataGridView and sort by date at rows

【发布时间】：2015-11-21 07:13:50

【问题描述】：

首先，我需要说声对不起，因为我的英语不好，而且我是 C# 的新手。 我有一个关于如何从我的数据库中仅获取“Summ”值并将其放入行并按“mm”和“yy”排序的问题，谢谢帮助。

数据库：

我有一个关于如何从我的数据库中只获取“Summ”值并将其放到行中并按“mm”和“yy”排序的问题，感谢您的帮助。这是我的设计视图（不能放图片）我只需要这样做：D

代码：

            DateTime endtime = new DateTime();

            DateTime starttime = new DateTime();

            endtime = dateTimePicker2.Value;
            starttime = dateTimePicker1.Value;
            int mount = (((endtime.Year - starttime.Year) * 12) + (endtime.Month + 1) - starttime.Month);

            textBox1.Text = mount.ToString();

string mm,yy;
            string inp;
            inp = textBox1.Text;
            int dt;
    dt = dataGridView1.Columns.Count;


            int.TryParse(inp, out dt); 
            dataGridView1.Columns.Clear();
            //sql connect

            SqlConnection coco = new SqlConnection("Data Source=192.168.9.11;Initial Catalog=db;Persist Security Info=True;User ID=sa;Password=;");
            coco.Open();
            SqlCommand comm = new SqlCommand("SELECT Summ FROM test_recv Where mm like"+mm+"yy like "+yy+"");
     try
            
                coco.Open();
               SqlDataReader reader = comm.ExecuteReader();

                    while (reader.Read())
                    
                      string  Summ = reader.GetString(0);
                    

                reader.Close();
                coco.Close();
            
            catch (Exception)
            
                if (coco.State == ConnectionState.Open)
                    coco.Close();
                


    for (int x = 0; x < dt; x++)
                
mm = starttime.AddMonths(x).ToString("MM", seCultureInfo);
yy = starttime.AddMonths(x).ToString("yyyy", seCultureInfo);
                    dataGridView1.Columns.Add("A", starttime.AddMonths(x).ToString("MM", seCultureInfo) + "/" + starttime.AddMonths(x).ToString("yyyy", seCultureInfo));
dataGridView1.Rows[0].Cells[x].Value = Summ;

【参考方案1】：

在您想要获取数据的地方使用此代码并将结果放在网格列中而不是行中：

var connection = new System.Data.SqlClient.SqlConnection(@"Your Connection String");

//Your command: SELECT yy+mm AS yymm, Summ FROM test_recv /*WHERE...*/ ORDER BY yymm ASC
//Add Whatever WHERE clause you need
//Pay attention that yy+mm Selected at first and Summ selected at seccond position
//Pay attention we ORDER BY yymm ASC
var command = new System.Data.SqlClient.SqlCommand("Your Command", connection);

try

    this.dataGridView1.Columns.Clear();
    this.dataGridView1.Rows.Clear();
    connection.Open();
    var reader = command.ExecuteReader();
    int columnIndex = 0;
    while (reader.Read())
    
        //0 is Index of Summ
        var header = reader.GetString(0);

        //1 is Index of yymm
        var value= reader.GetString(1);

        var column = new DataGridViewTextBoxColumn();
        column.HeaderText = header;
        this.dataGridView1.Columns.Add(column);
        if(dataGridView1.RowCount==0)
            this.dataGridView1.Rows.Add(1);

        this.dataGridView1.Rows[0].Cells[columnIndex].Value = value;

        columnIndex++;
    

catch (Exception ex)

    MessageBox.Show(ex.Message);

finally

    if (connection.State == ConnectionState.Open)
        connection.Close();

这是测试数据

Summ    mm      yy      
------------------------
10000   08      2015
15000   09      2015      
8000    10      2015
20000   11      2015
5000    12      2015

这是截图：