如何选择要向DataGridView中添加数据的列？

Question

我有此源代码：

private void button1_Click(object sender, EventArgs e)
    {
        dataGridView1.Visible = true;
        dataGridView2.Visible = true;
        SqlConnection con = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=D:\Olimpiada\SistemSolar\SistemSolar\DBSistem.mdf;Integrated Security=True;User Instance=True");
        con.Open();
        SqlCommand cmd = new SqlCommand("SELECT Denumire FROM Caracteristici", con);
        SqlCommand cmd1 = new SqlCommand("SELECT Valoare FROM Valori", con);
        SqlDataReader sdr = cmd.ExecuteReader();
        while (sdr.Read())
        {
            string[] RowData = { sdr.GetString(0) };
            dataGridView2.Rows.Add(RowData);
        }
        sdr.Close();
        //SqlCommand cmd1 = new SqlCommand("SELECT Valoare FROM Valori", con);
        SqlDataReader sdr1 = cmd1.ExecuteReader();
        while(sdr1.Read())
        {
            string[] RowData1 = { sdr1.GetString(0) };
            dataGridView2.Rows.Add(RowData1);
        }
        sdr1.Close();
        SqlCommand cmd2 = new SqlCommand("SELECT UM FROM Caracteristici", con);
        SqlDataReader sdr2 = cmd2.ExecuteReader();
        while (sdr2.Read())
        {
            string[] RowData2 = { sdr2.GetString(0) };
            dataGridView2.Rows.Add(RowData2);
        }
        sdr2.Close();

    }

我对此有一个疑问：完成插入RowData后，如何选择移至另一列？ 因为使用此代码，所有数据仅在单个列上。

Answer 1

问题是，当您将数据添加到行时，您将像这样添加数据：

string[] RowData = { sdr.GetString(0) };
dataGridView2.Rows.Add(RowData);

这总是将数据添加到第一列。 要将数据添加到其他列，您需要将数据添加到所需的列索引中，例如

string[] RowData = { "Column1", sdr.GetString(0), "Column3" };

如果有3列，则将数据添加到第二列。

https://msdn.microsoft.com/zh-CN/library/system.windows.forms.datagridview.rows(v=vs.110).aspx

Answer 2

这是一个主意，希望您能理解！ 本示例将添加一行并填充所有列：

foreach (var item in Logs)
{
    string[] row = new string[] { item.Id, item.Name, item.Description };

    dataGridView.Rows.Add(row);
    dataGridView.ClearSelection();
    dataGridView.Rows[dataGridView.Rows.Count - 1].Selected = true;
    dataGridView.FirstDisplayedScrollingRowIndex = dataGridView.Rows.Count - 1;
}

string[] row = new string[] { item.Id, item.Name, item.Description };的顺序string[] row = new string[] { item.Id, item.Name, item.Description }; 应该等于您的datagridView列顺序。

登录我的代码是List<Log> ，但应该与任何其他集合类型一起使用。

如果日志中充满了各种对象，则此示例将添加相同数量的行。

Answer 3

我解决了问题，我将解决方案留在这里：

string[] x = new string[100];
        string[] y = new string[100];
        string[] z = new string[100];
        string[] den = new string[100];
        SqlConnection con = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\DBSistem.mdf;Integrated Security=True;User Instance=True");
        con.Open();
        SqlCommand cmd = new SqlCommand("SELECT Denumire FROM Caracteristici", con);
        SqlCommand cmd1 = new SqlCommand("SELECT Valoare FROM Valori", con);
        SqlDataReader sdr = cmd.ExecuteReader();
        int i = 0;
        while (sdr.Read())
        {
                x[i] = sdr.GetString(0);
                i++;
        }
        sdr.Close();
        SqlDataReader sdr1 = cmd1.ExecuteReader();
        i = 0;
        while(sdr1.Read())
        {
            y[i] = sdr1.GetString(0);
            i++;
        }
        sdr1.Close();
        i = 0;
        SqlCommand cmd2 = new SqlCommand("SELECT UM From Caracteristici", con);
        SqlDataReader sdr2 = cmd2.ExecuteReader();
        while (sdr2.Read())
        {
            z[i] = sdr2.GetString(0);
            i++;
        }
        sdr2.Close();
        for (i = 0; i <= 10; i++)
        {
            string[] RowData = { x[i], y[i], z[i] };
            dataGridView2.Rows.Add(RowData);
        }