如何檢索datagridview的C＃

Question

我有一個DataGridView中選擇一個行包含列複選框，

現在我想，當我從複選框選擇的DataGridView一行，我點擊按鈕保存我找回行以及一些價值 如何請和謝謝你提前如下

我的WinForms：

守則如下：

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Linq; 
using System.Text; 
using System.Windows.Forms; 

namespace gestion_attachements_decomptes 
{ 
    public partial class ajouter_attachement : Form 
    { 

     public ajouter_attachement(string num_marche,string libelle_fournisseur) 
     { 
      InitializeComponent(); 
      textBox1.Text = num_marche; 
      textBox2.Text = libelle_fournisseur; 
     } 


     private void ajouter_attachement_Load(object sender, EventArgs e) 
     { 
      //désactiver button enregistrer 
      button1.Enabled = false; 

      //ajouter checkbox dans datagrid view 
      DataGridViewCheckBoxColumn chk = new DataGridViewCheckBoxColumn(); 
      chk.HeaderText = ""; 
      chk.Name = "CheckBox"; 
      dataGridView2.Columns.Add(chk); 

      dataGridView2.AllowUserToAddRows = false; 
      dataGridView2.AllowUserToDeleteRows = false; 


     } 




     private void button4_Click(object sender, EventArgs e) 
     { 

      Program.cmd.CommandText = "select * from bon_reception_marche where Date_reception between '" + dateTimePicker1.Value.Date + "' and '" + dateTimePicker2.Value.Date + "'"; 
      Program.dr = Program.cmd.ExecuteReader(); 
      while (Program.dr.Read()) 
      { 
       dataGridView2.Rows.Add(Program.dr[2], Program.dr[3], Program.dr[5], Program.dr[6], Program.dr[7], Program.dr[8], Program.dr[9], Program.dr[10], Program.dr[11], Program.dr[12]); 
      } 
      Program.dr.Close(); 

     } 

     private void dataGridView2_CellClick(object sender, DataGridViewCellEventArgs e) 
     { 
      if (e.ColumnIndex == 10/*myColumn*/ && e.RowIndex >= 0 /*myRow*/) 
      { 
       button1.Enabled = true; 
      } 
     } 



     private void button1_Click(object sender, EventArgs e) 
     { 
      // index of the checkbox column 
      int colIndex = dataGridView2.Columns["CheckBox"].Index; 

      var rows = dataGridView2.Rows 
         .Cast<DataGridViewRow>() 
         .Where(row => row.Cells[colIndex].Value != null) 
         .Where(row => (bool)row.Cells[colIndex].Value) 
         .ToList(); 
      // loop through entire DataGridView and see if checkbox is checked 
      foreach (DataGridViewRow row in dataGridView2.Rows) 
      { 
       // checked if the cell's value is true 
       if ((bool)rows.Cells[colIndex].Value) 
       { 
        MessageBox.Show("ok"); 
       } 
      } 
      ////if (dataGridView2.Columns == 10) 
      ////{ 
      //// double montant = Convert.ToDouble(dataGridView2.CurrentRow.Cells["Montant"].Value); 
      ////} 
      //int id_br = Convert.ToInt32( dataGridView2.CurrentRow.Cells["Id_bon_reception_marche"].Value); 
      //Program.cmd.CommandText = ""; 
      //Program.cmd.ExecuteNonQuery(); 
      //MessageBox.Show("c'est ajouté avec succés"); 
      //Program.cmd.Parameters.Clear(); 
     } 



    } 
} 

Answer 1

// give a method to be run when the save button is clicked 
saveButton.Click += saveButton_Click; 


// implementation of the saveButton's above click event 
private void saveButton_Click(object sender, EventArgs e) 
{ 
    // index of the checkbox column 
    int colIndex = dataGridView1.Columns["checkBoxColumn"].Index; 

    List<DataGridViewRow> rows = new List<DataGridViewRow>(); 
    // loop through entire DataGridView and see if checkbox is checked 
    foreach (DataGridViewRow row in dataGridView1.Rows) 
    { 
     // checked if the cell's value is true 
     if (row.Cells[colIndex].Value != null && (bool)row.Cells[colIndex].Value) 
      rows.Add(row); 
    } 

    // do whatever processing here with rows 
} 

或者到foreach循環你可以使用LINQ來描述你想要什麼（請務必把using System.Linq;在頂部）。

int colIndex = dataGridView1.Columns["checkBoxColumn"].Index; 
var rows = dataGridView1.Rows 
    .Cast<DataGridViewRow>() 
    .Where(row => row.Cells[colIndex].Value != null) 
     && (bool)row.Cells[colIndex].Value) 
    .ToList(); 

// do whatever processing here with rows 

編輯：

private void button1_Click(object sender, EventArgs e) 
{ 
    int colIndex = dataGridView2.Columns["CheckBox"].Index; 
    try 
    { 
     var rows = dataGridView2.Rows 
      .Cast<DataGridViewRow>() 
      .Where(row => row.Cells[colIndex].Value != null 
       && row => (bool)row.Cells[colIndex].Value) 
      .ToList(); 

     foreach(DataGridViewRow row in rows) 
      insertRowData(row); 

     MessageBox.Show("c'est ajouté avec succés"); 
    } 
    catch (FormatException) 
    { 
     MessageBox.Show("Only input numbers into the table!", 
         "Only Numbers", MessageBoxButtons.OK); 
    } 
    catch (Exception) 
    { 
     MessageBox.Show("There was an error while saving!", 
         "Error", MessageBoxButtons.OK); 
    } 
} 

private void insertRowData(DataGridViewRow row) 
{ 
    double montantValue = row.Cells["Montant"].Value != "" ? 
     Convert.ToDouble(row.Cells["Montant"].Value) : 0; 
    int id_br = Convert.ToInt32(row.Cells["Id_bon_reception_marche"].Value); 

    Program.cmd.Parameters.Clear(); 
    // change your sql to however you need to insert it 
    Program.cmd.CommandText = "INSERT INTO tableName (montantColumn, idColumn) VALUES (@montant, @id);"; 
    Program.cmd.Parameters.AddWithValue("@montant", montantValue); 
    Program.cmd.Parameters.AddWithValue("@id", id_br); 
    Program.cmd.ExecuteNonQuery(); 
}