如何在 DataGridView 中查看超过 15 个字符的数字？

Question

我正在尝试将一个超过 15 个字符的数字从 CSV 文件导入 DataGridView。在 CSV 文件中，它看起来像 8940012004412026012，但在 DataGridView 中导入后显示为 8.9400120044120259E + 18。

这是我现在的代码：

public static DataTable GetDataTable(string strFileName)
{
    ADODB.Connection oConn = new ADODB.Connection();
    oConn.Open("Provider=Microsoft.Jet.OleDb.4.0; Data Source = " + System.IO.Path.GetDirectoryName(strFileName) + "; Extended Properties = \"Text;HDR=YES;FMT=Delimited\";", "", "", 0);
    string strQuery = "SELECT * FROM [" + System.IO.Path.GetFileName(strFileName) + "]";
    ADODB.Recordset rs = new ADODB.Recordset();
    System.Data.OleDb.OleDbDataAdapter adapter = new System.Data.OleDb.OleDbDataAdapter();
    DataTable dt = new DataTable();
    rs.Open(strQuery, "Provider=Microsoft.Jet.OleDb.4.0; Data Source = " + System.IO.Path.GetDirectoryName(strFileName) + "; Extended Properties = \"Text;HDR=YES;FMT=Delimited\";",
        ADODB.CursorTypeEnum.adOpenForwardOnly, ADODB.LockTypeEnum.adLockReadOnly, 1);
    adapter.Fill(dt, rs);
    return dt;
}

private void Import()
{
    if (textBox4.Text.Trim() != string.Empty)
    {
        try
         {
            DataTable ct = GetDataTable(textBox4.Text);
            dataGridView2.AllowUserToAddRows = false;
            dataGridView2.DataSource = ct;
            dataGridView2.Columns[0].HeaderCell.Value = "1";
            dataGridView2.Columns[1].HeaderCell.Value = "2";
            dataGridView2.Columns[2].HeaderCell.Value = "3";
           
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message.ToString());
        }
    }
}

dataGridView2.Columns[2].HeaderCell.Value = "3";

需要8940012004412026012

Answer 1

感谢您使用 CsvHelper 的建议，这是我找到的解决方案

 private void button60_Click(object sender, EventArgs e)
    {
        OpenFileDialog fdlg = new OpenFileDialog();
        fdlg.Title = "Select file";
        fdlg.InitialDirectory = @"c:\";
        fdlg.FileName = textBox4.Text;
        fdlg.Filter = "Text and CSV Files(*.txt, *.csv)|*.txt;*.csv|Text Files(*.txt)|*.txt|CSV Files(*.csv)|*.csv|All Files(*.*)|*.*";
        fdlg.FilterIndex = 1;
        fdlg.RestoreDirectory = true;
        if (fdlg.ShowDialog() == DialogResult.OK)
        {
            using (var reader = new StreamReader(fdlg.FileName))
            using (var csv = new CsvReader(reader, CultureInfo.InvariantCulture))

            {
                using (var dr = new CsvDataReader(csv))
                {
                    var dt = new DataTable();
                    dt.Load(dr);
                    dataGridView2.DataSource = dt;
                }
            }
        }
    }

如何在 DataGridView 中查看超过 15 个字符的数字？

How to see a number with more than 15 characters in a DataGridView?

c#

datagridview

winforms

csv-import