将单选行从datagridview复制到另一个datagridview

Question

what i need to do : 1. When a user clicks on A ROW of a datagriview. Only this row is displayed in another datagridview (so that it can be edited etc...)

NOTE : grid_display = from where i need to get the row. NOTE : grid_detail = to where i need the single row to be copied.

what i have till now:

   foreach (DataGridViewColumn c in grid_display.Columns)
            {
                grid_detail.Columns.Add(c.Clone() as DataGridViewColumn);
            }

            //then you can copy the rows values one by one (working on the selectedrows collection)
            foreach (DataGridViewRow r in grid_display.SelectedRows)
            {
                int index = grid_detail.Rows.Add(r.Clone() as DataGridViewRow);
                foreach (DataGridViewCell o in r.Cells)
                {
                    grid_detail.Rows[index].Cells[o.ColumnIndex].Value = o.Value;
                }
            }

            }

I am only able to make a new row. But not to feed in the selected row in it. Any help ?

Answer 1

As I mentioned in my comment already, you should use a DataSource for your DataGridView s and use a DataGridView as view only.

Here you have complete example that demonstrates how to use a DataTable as a DataSource for a DataGridView and move a DataRow between them.

1. Creata a new windows forms project and copy paste the code.
2. Click on a row, by clicking left from the row (indicated with a small arrow > ) in the DataGridView
3. Click on the Button below the DataGridView to move the selected DataRow to the other DataGridView

NOTE 1: All the controls are crated in Form1_Load so dont bother drag dropping controls on the form.

NOTE 2: If you have only a column selected, no rows will be moved. You have to select the entire row.

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 WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.Load +=Form1_Load;
        }

        public DataGridView ViewA, ViewB;

        public DataTable DataA, DataB;

        public Button MoveSelectedFromViewAToB, MoveSelectedFromViewBToA;

        private void Form1_Load(object sender, EventArgs e)
        {
            //Create two DataGridViews on the form
            ViewA = new DataGridView()
            {
                Location = new Point(0, 0),
                Size = new Size(300, 100),
                MultiSelect = false
            };

            ViewB = new DataGridView()
            {
                Location = new Point(300, 0),
                Size = new Size(300, 100),
                MultiSelect = false
            };
            this.Controls.Add(ViewA);
            this.Controls.Add(ViewB);

            //Add Two buttons
            Button MoveSelectedFromViewAToB = new Button()
            {
                Text = "A => B",
                Location = new Point(10, 120),
            };
            MoveSelectedFromViewAToB.Click += MoveSelectedFromViewAToB_Click;
            MoveSelectedFromViewBToA = new Button()
            {
                Text = "A <= B",
                Location = new Point(310, 120)
            };
            MoveSelectedFromViewBToA.Click += MoveSelectedFromViewBToA_Click;
            this.Controls.Add(MoveSelectedFromViewAToB);
            this.Controls.Add(MoveSelectedFromViewBToA);

            //Make sure the form has appropriate size
            this.Size = new Size(600, 200);

            //Create a DataTable and add some data
            DataA = new DataTable();
            DataA.Columns.Add("Key", typeof(System.String));
            DataA.Columns.Add("Value", typeof(System.String));
            DataA.Rows.Add(new object[] { "KeyA", "ValueA" });
            DataA.Rows.Add(new object[] { "KeyB", "ValueB" });
            DataA.Rows.Add(new object[] { "KeyC", "ValueC" });
            DataA.Rows.Add(new object[] { "KeyD", "ValueD" });

            //Make sure DataB has the same layout as DataA
            DataB = DataA.Clone();

            //Assign both datatables to the views
            ViewA.DataSource = new BindingSource() { DataSource = DataA };
            ViewB.DataSource = new BindingSource() { DataSource = DataB };
        }

        /// <summary>
        /// Moves rows from view A to B
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void MoveSelectedFromViewAToB_Click(object sender, EventArgs e)
        {
            if (ViewA.SelectedRows.Count == 0 || DataA.Rows.Count == 0 || ViewA.SelectedRows[0].Index > DataA.Rows.Count -1) return;//No row selected, or data table is empty
            DataB.ImportRow(DataA.Rows[ViewA.SelectedRows[0].Index]);
            DataA.Rows.RemoveAt(ViewA.SelectedRows[0].Index);
        }

        /// <summary>
        /// Moves rows from view B to A
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        void MoveSelectedFromViewBToA_Click(object sender, EventArgs e)
        {
            if (ViewB.SelectedRows.Count == 0 || DataB.Rows.Count == 0 || ViewB.SelectedRows[0].Index > DataB.Rows.Count -1) return; //No row selected, or data table is empty
            DataA.ImportRow(DataB.Rows[ViewB.SelectedRows[0].Index]);
            DataB.Rows.RemoveAt(ViewB.SelectedRows[0].Index);
        }
    }
}

With this you should be able to implement your logic of when to move a row to your grid_detail and when to move it back to grid_display .

Answer 2

Guys i got to solve the problem. I proceeded as below.

First i cloned the columns, for this i created a method

  public void change_header()
        {
            DisplayDataGrid();
            grid_detail.Columns.Clear();

            foreach (DataGridViewColumn c in grid_display.Columns)
            {
                grid_detail.Columns.Add(c.Clone() as DataGridViewColumn);
            }
        }

then I copied the SELECTED row only and displayed it in the second datagridview (as header columns have already been duplicated) the data now displayed are presentable.

How I copied selected row ? Here it is.

 grid_detail.Rows.Clear(); 
            DataRow[] dRows = new DataRow[grid_display.SelectedRows.Count];
            for (int i = 0; i < grid_display.SelectedRows.Count; i++)
                dRows[i] = ((DataRowView)grid_display.SelectedRows[i].DataBoundItem).Row;
                foreach (DataRow dgvRow in dRows)
                {
                    grid_detail.Rows.Insert(0, dgvRow.ItemArray);
                }
                grid_detail.Refresh();

Where grid_display is dgv with FULL data and grid_detail is the dgv with the selected row only. Thanks.

Answer 3

If the data your grid_display comes from a query (like MySQL, etc.), what you can do is to redo the query but make it specific so that the resulting data is the same as the one you selected when you clicked the cell from grid_display...then put the result in your grid_detail.

This is one solution I think you could do...but you cannot do multiple transfer at once because you are making a query...

Hope it helps... :D