如何解决C# 使用 2 个列表框从 CSV 中选择所需的列并在 dataGridView 中显示
我正在开发的程序有 2 个列表框、2 个 dataGridView、用于在 2 个列表框之间移动所选项目的按钮，以及一个带有用于选择和加载 CSV 的按钮的文本框。选择 CSV 后，listBox1 将填充来自 CSV 的所有标题。单击“导入原始结果”后，数据将显示在 dataGridView1 中。您将如何使用 listBox2 选择要在 dataGridView2 中显示的标题（列）并显示 CSV 中的所有选定数据？
我需要构建的方法从第 135 行开始- selectedResultsCsv()
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using Microsoft.VisualBasic.FileIO; // add reference to Microsoft.VisualBasic for CSV parsing
namespace ImportTimeCardCSV
{
public partial class ResultsForm : Form
{
public ResultsForm()
{
InitializeComponent();
}//End ResultsForm
private void ResultsForm_Load(object sender,EventArgs e)
{
}//End ResultsForm_Load
DataTable ResultsTable = new DataTable();
private DataTable selectedResultsTable = new DataTable(); //has not been used yet
//
//Below Region has all code for Open File Dialog - opening Results CSV
//
#region OpenFileDialog
private void resultsCsvOpenFileDialog()
{
OpenFileDialog ResultsOpenFileDialog = new OpenFileDialog();
ResultsOpenFileDialog.Title = "Choose a Results CSV File";
ResultsOpenFileDialog.DefaultExt = "csv";
ResultsOpenFileDialog.Filter = "csv files (*.csv)|*.csv|txt files (*.txt)|*.txt|All files (*.*)|*.*";
ResultsOpenFileDialog.FilterIndex = 1;
ResultsOpenFileDialog.RestoreDirectory = true;
if (ResultsOpenFileDialog.ShowDialog() == DialogResult.OK)
{
txtResultsCsvFilename.Text = ResultsOpenFileDialog.FileName;
listBox1.Items.Clear();
using (textfieldparser parser = new textfieldparser(txtResultsCsvFilename.Text)) //Read the headers and add to listBox1
{
parser.TextFieldType = FieldType.Delimited;
parser.SetDelimiters(";");
string[] fields = parser.ReadFields();
int Index = 0;
foreach (string field in fields)
{
if (chkResultsCsvHeaders.Checked)
{
//listBox1.Items.Add(Index.ToString() + ":" + field); //displays the number of the column and header name,ex: 1: Name
listBox1.Items.Add(field); //displays only the column header name,ex: Name
}
else
{
listBox1.Items.Add("Column " + Index.ToString() + ": " + field); //displays Column,the number of the column,and header name,ex: Column 1: Name
}
Index++;
}
parser.Close();
}//end using
}//end if
}//End resultsCsvOpenFileDialog()
private void cmdResultsCsvOpenFileDialog_Click(object sender,EventArgs e)
{
resultsCsvOpenFileDialog();
}//End cmdResultsCsvOpenFileDialog_Click
#endregion
//
//Below Region has all code for Importing Results - From CSV to Datagridviews
//
#region Import
private void importToGridButton_Click(object sender,EventArgs e)
{
importResultsCsv();
}//End importToGridButton_Click
private void importResultsCsv()
{
if (txtResultsCsvFilename.Text == "")
{
MessageBox.Show("Select a Results CSV to load.");
}
else
{
string[] results_text = File.ReadAllLines(txtResultsCsvFilename.Text);
string[] data_col = null;
int x = 0;
int RowIndex = 0;
foreach (string text_line in results_text)
{
data_col = text_line.Split(';');
if (x == 0)
{
//header
for (int i = 0; i <= data_col.Count() - 1; i++)
{
ResultsTable.Columns.Add(data_col[i]);
}
x++;
}
else
{
//data
ResultsTable.Rows.Add(data_col);
}
RowIndex++;
lblResultsProcessed.Text = RowIndex + " Result(s)";
}//end foreach
dataGridView1.DataSource = ResultsTable;
}//end else
}//End importResultsCsv
private void cmdselectedResultImport_Click(object sender,EventArgs e)
{
DialogResult dialog = MessageBox.Show("Please confirm the selections you have made.","Confirm Selections",MessageBoxButtons.YesNo,MessageBoxIcon.Question);
if (dialog == DialogResult.Yes)
{
//dataGridView2.DataSource = selectedResultsTable; //NEED SELECTED RESULTS
selectedResultsCsv();
}
else
{
MessageBox.Show("Please select at least one result.","Selection",MessageBoxButtons.OK,MessageBoxIcon.information);
}
}//End cmdselectedResultImport_Click
private void selectedResultsCsv()
{
//method in questioning
}//End selectedResultsCsv
#endregion
///
///Below Region has all code for the buttons working with the list Boxes
///
#region Buttons for listBoxes
private void rightButton_Click(object sender,EventArgs e)
{
if (listBox1.Selectedindex == -1)
{
MessageBox.Show("Please select an item.");
}
else
{
listBox2.Items.Add(listBox1.SelectedItem);
int i = 0;
i = listBox1.Selectedindex;
//listBox1.Items.RemoveAt(i);
}
}//End rightButton_Click
private void multipleRightButton_Click(object sender,EventArgs e)
{
if (listBox1.Selectedindex == -1)
{
MessageBox.Show("Please select an item.");
}
else
{
while (listBox1.SelectedItems.Count != 0)
{
foreach (var items in listBox1.SelectedItems)
{
listBox2.Items.Add(items);
}
for (int i = listBox1.SelectedItems.Count - 1; i >= 0; i--)
{
listBox1.Items.Remove(listBox1.SelectedItems[i]);
}
}
}
}//End multipleRightButton_Click
private void moveAllRightButton_Click(object sender,EventArgs e)
{
while (listBox1.Items.Count != 0)
{
for (int i = 0; i < listBox1.Items.Count; i++)
{
listBox2.Items.Add(listBox1.Items[i]);
listBox1.Items.Remove(listBox1.Items[i]);
}
}
}//End moveAllRightButton_Click
private void leftButton_Click(object sender,EventArgs e)
{
if (listBox2.Selectedindex == -1)
{
MessageBox.Show("Please select an item.");
}
else
{
listBox1.Items.Add(listBox2.SelectedItem);
int i = 0;
i = listBox2.Selectedindex;
listBox2.Items.RemoveAt(i);
}
}//End leftButton_Click
private void multipleLeftButton_Click(object sender,EventArgs e)
{
if (listBox2.Selectedindex == -1)
{
MessageBox.Show("Please select an item.");
}
else
{
while (listBox2.SelectedItems.Count != 0)
{
foreach (var items in listBox2.SelectedItems)
{
listBox1.Items.Add(items);
}
for (int i = listBox2.SelectedItems.Count - 1; i >= 0; i--)
{
listBox2.Items.Remove(listBox2.SelectedItems[i]);
}
}
}
}//End multipleLeftButton_Click
private void moveAllLeftButton_Click(object sender,EventArgs e)
{
while (listBox2.Items.Count != 0)
{
for (int i = 0; i < listBox2.Items.Count; i++)
{
listBox1.Items.Add(listBox2.Items[i]);
listBox2.Items.Remove(listBox2.Items[i]);
}
}
}//End moveAllLeftButton_Click
private void upButton_Click(object sender,EventArgs e)
{
if (listBox2.Selectedindex == -1)
{
MessageBox.Show("Please select an item.");
}
else
{
int i = listBox2.Selectedindex;
string item = listBox2.SelectedItem.ToString();
if (i > 0)
{
listBox2.Items.RemoveAt(i);
listBox2.Items.Insert(i - 1,item);
listBox2.SetSelected(i - 1,true);
}
}
}//End upButton_Click
private void downButton_Click(object sender,EventArgs e)
{
if (listBox2.Selectedindex == -1)
{
MessageBox.Show("Please select an item.");
}
else
{
int i = listBox2.Selectedindex;
string item = listBox2.SelectedItem.ToString();
if (i < listBox2.Items.Count - 1)
{
listBox2.Items.RemoveAt(i);
listBox2.Items.Insert(i + 1,item);
listBox2.SetSelected(i + 1,true);
}
}
}//End downButton_Click
private void deleteButton_Click(object sender,EventArgs e)
{
if (listBox2.Selectedindex == -1)
{
MessageBox.Show("Please select an item.");
}
else
{
int i = 0;
i = listBox2.Selectedindex;
listBox2.Items.RemoveAt(i);
}
}//End deleteButton_Click
private void clearButton_Click_1(object sender,EventArgs e)
{
while (listBox2.Items.Count != 0)
{
if (listBox2.Items.Count != 0)
{
MessageBox.Show("Select a Results CSV.");
}
listBox2.Items.Clear();
listBox1.Items.Clear();
resultsCsvOpenFileDialog();
}
}//End clearButton_Click_1
#endregion
}//End ResultsForm : Form
}//End ImportTimeCardCSV
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