DataGridView Selected Row Move UP and DOWN

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How can I allow selected rows in a DataGridView (DGV) to be moved up or down. I have done this before with a ListView. Unfortunetly, for me, replacing the DGV is not an opt

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时光取名叫无心

2020-12-06 01:56

   DataGridViewRow BeginingRow = new DataGridViewRow();
   int BeginingRowIndex ;   
        private void DataGridView1_CellMouseUp(object sender, DataGridViewCellMouseEventArgs e)
    {
        if (e.Button != MouseButtons.Left ||e.RowIndex < 0 ) return;
            if (BeginingRowIndex > e.RowIndex)
            {
                DataGridView1.Rows.Insert(e.RowIndex);
                foreach (DataGridViewCell cellules in BeginingRow.Cells)
                {
                    DataGridView1.Rows[e.RowIndex].Cells[cellules.ColumnIndex].Value = cellules.Value;
                }
                DataGridView1.Rows.RemoveAt(BeginingRowIndex + 1);

            }
            else
            {
                DataGridView1.Rows.Insert(e.RowIndex +1);
                foreach (DataGridViewCell cellules in BeginingRow.Cells)
                {
                    DataGridView1.Rows[e.RowIndex+1].Cells[cellules.ColumnIndex].Value = cellules.Value;
                }
                DataGridView1.Rows.RemoveAt(BeginingRowIndex);
            }

            DataGridView1.RowsDefaultCellStyle.ApplyStyle(BeginingRow.DefaultCellStyle);
            DataGridView1.Rows[e.RowIndex].Selected = true;
    }

    private void DataGridView1_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
    {
        if (e.Button != MouseButtons.Left ||e.RowIndex < 0 ) return;
                BeginingRowIndex = e.RowIndex;
                BeginingRow = DataGridView1.Rows[BeginingRowIndex];
                BeginingRow.DefaultCellStyle = DataGridView1.Rows[BeginingRowIndex].DefaultCellStyle;
    }

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面向向阳花

2020-12-06 01:59

this is the shortest solution I have found to the problem and I just refactored a little bit the code found in:

http://dotnetspeaks.net/post/Moving-GridView-Rows-Up-Down-in-a-GridView-Control.aspx

<body>
<form id="form1" runat="server">
<asp:GridView ID="GridView1" Font-Names="Verdana" Font-Size="9pt" runat="server" OnRowCreated="GridView1_RowCreated"
    AutoGenerateColumns="False" CellPadding="4" BorderColor="#507CD1" BorderStyle="Solid">
    <Columns>
        <asp:TemplateField HeaderText="First Name">
            <ItemTemplate>
                <asp:Label ID="txtFirstName" runat="server" Text='<%# Eval("FirstName") %>' />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
    <HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
    <AlternatingRowStyle BackColor="White" />
</asp:GridView>

<asp:Button ID="btnUp" runat="server" Text="Up" OnClick="btnUp_Click"/>
<asp:Button ID="btnDown" runat="server" Text="Down"  OnClick="btnDown_Click" />
</form>

and with code behind...

public int SelectedRowIndex { get; set; }


    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            //Test Records  
            GridView1.DataSource = Enumerable.Range(1, 5).Select(a => new
            {
                FirstName = String.Format("First Name {0}", a),
                LastName = String.Format("Last Name {0}", a),
            });
            GridView1.DataBind();
        }  
    }

    protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
            e.Row.Attributes["onmouseover"] = "this.style.cursor='pointer'";
            e.Row.ToolTip = "Click to select row";
            e.Row.Attributes["onclick"] = Page.ClientScript.GetPostBackClientHyperlink(GridView1, "Select$" + e.Row.RowIndex);
        }
    }


    protected void btnUp_Click(object sender, EventArgs e)
    {
        var rows = GridView1.Rows.Cast<GridViewRow>().Where(a => a != GridView1.SelectedRow).ToList();
        //If First Item, insert at end (rotating positions)  
        if (GridView1.SelectedRow.RowIndex.Equals(0))
        {
            rows.Add(GridView1.SelectedRow);
            SelectedRowIndex = GridView1.Rows.Count -1;
        }
        else
        {
            SelectedRowIndex = GridView1.SelectedRow.RowIndex - 1;
            rows.Insert(GridView1.SelectedRow.RowIndex - 1, GridView1.SelectedRow);
        }
        RebindGrid(rows);
    }

    protected void btnDown_Click(object sender, EventArgs e)
    {
        var rows = GridView1.Rows.Cast<GridViewRow>().Where(a => a != GridView1.SelectedRow).ToList();
        //If Last Item, insert at beginning (rotating positions)  
        if (GridView1.SelectedRow.RowIndex.Equals(GridView1.Rows.Count - 1))
        {
            rows.Insert(0, GridView1.SelectedRow);
            SelectedRowIndex = 0;
        }
        else
        {
            SelectedRowIndex = GridView1.SelectedRow.RowIndex + 1;
            rows.Insert(GridView1.SelectedRow.RowIndex + 1, GridView1.SelectedRow);
        }
        RebindGrid(rows);
    }

    private void RebindGrid(IEnumerable<GridViewRow> rows)
    {
        GridView1.DataSource = rows.Select(a => new
        {
            FirstName = ((Label)a.FindControl("txtFirstName")).Text,
        }).ToList();

        GridView1.SelectedIndex = SelectedRowIndex;
        GridView1.DataBind();
    }

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长发绾君心

2020-12-06 02:00

There is a much simpler way that most posts here (in my opinion). Performing the action for an "up" button click is basically just a swap of rows with the one above. If you are controlling the values yourself (as the question was stated) then you just need to swap the values of the rows. Quick and simple!

NOTE: this works only when multiselect is disabled on the datagrid! As you can tell I am only paying attention to item at index 0 in the SelectedRows collection.

Here is what I used:

    private void btnUp_Click(object sender, EventArgs e)
    {
        var row = dgvExportLocations.SelectedRows[0];

        if (row != null && row.Index > 0)
        {
            var swapRow = dgvExportLocations.Rows[row.Index - 1];
            object[] values = new object[swapRow.Cells.Count];

            foreach (DataGridViewCell cell in swapRow.Cells)
            {
                values[cell.ColumnIndex] = cell.Value;
                cell.Value = row.Cells[cell.ColumnIndex].Value;
            }

            foreach (DataGridViewCell cell in row.Cells)
                cell.Value = values[cell.ColumnIndex];

            dgvExportLocations.Rows[row.Index - 1].Selected = true;//have the selection follow the moving cell
        }
    }

To perform a "down" click you can do the opposite as well, same logic

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情深已故

2020-12-06 02:06

private void butUp_Click(object sender, EventArgs e)
{
    DataTable dtTemp = gridView.DataSource as DataTable;

    object[] arr = dtTemp.Rows[0].ItemArray;
    for (int i = 1; i < dtTemp.Rows.Count; i++)
    {
        dtTemp.Rows[i - 1].ItemArray = dtTemp.Rows[i].ItemArray;
    }
    dtTemp.Rows[dtTemp.Rows.Count - 1].ItemArray = arr;

}
private void butDown_Click(object sender, EventArgs e)
{
    DataTable dtTemp = gridView.DataSource as DataTable;

    object[] arr = dtTemp.Rows[dtTemp.Rows.Count - 1].ItemArray;
    for (int i = dtTemp.Rows.Count - 2; i >= 0; i--)
    {
        dtTemp.Rows[i + 1].ItemArray = dtTemp.Rows[i].ItemArray;
    }
    dtTemp.Rows[0].ItemArray = arr;
}

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庸人自扰

2020-12-06 02:07

Just to expand on Yoopergeek's answer, here's what I have. I was not using a DataSource (data is being dropped to registry on form close, and reload on form load)

This sample will keep rows from being moved off the grid and lost, and reselect the cell the person was in as well.

To make things simpler for copy / paste, I modified so you need only change "gridTasks" to your DataGridView's name, rather than renaming it throughout the code.

This solution works only for single cell/row selected.

private void btnUp_Click(object sender, EventArgs e)
{
    DataGridView dgv = gridTasks;
    try
    {
        int totalRows = dgv.Rows.Count;
        // get index of the row for the selected cell
        int rowIndex = dgv.SelectedCells[ 0 ].OwningRow.Index;
        if ( rowIndex == 0 )
            return;
        // get index of the column for the selected cell
        int colIndex = dgv.SelectedCells[ 0 ].OwningColumn.Index;
        DataGridViewRow selectedRow = dgv.Rows[ rowIndex ];
        dgv.Rows.Remove( selectedRow );
        dgv.Rows.Insert( rowIndex - 1, selectedRow );
        dgv.ClearSelection();
        dgv.Rows[ rowIndex - 1 ].Cells[ colIndex ].Selected = true;
    }
    catch { }
}

private void btnDown_Click(object sender, EventArgs e)
{
    DataGridView dgv = gridTasks;
    try
    {
        int totalRows = dgv.Rows.Count;
        // get index of the row for the selected cell
        int rowIndex = dgv.SelectedCells[ 0 ].OwningRow.Index;
        if ( rowIndex == totalRows - 1 )
            return;
        // get index of the column for the selected cell
        int colIndex = dgv.SelectedCells[ 0 ].OwningColumn.Index;
        DataGridViewRow selectedRow = dgv.Rows[ rowIndex ];
        dgv.Rows.Remove( selectedRow );
        dgv.Rows.Insert( rowIndex + 1, selectedRow );
        dgv.ClearSelection();
        dgv.Rows[ rowIndex + 1 ].Cells[ colIndex ].Selected = true; 
    }
    catch { }
}

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我在风中等你

2020-12-06 02:07

This should work. I use a BindingSource instead of binding my List directly to the DataGridView:

    private List<MyItem> items = new List<MyItem> {
        new MyItem {Id = 0, Name = "Hello"},
        new MyItem {Id = 1, Name = "World"},
        new MyItem {Id = 2, Name = "Foo"},
        new MyItem {Id = 3, Name = "Bar"},
        new MyItem {Id = 4, Name = "Scott"},
        new MyItem {Id = 5, Name = "Tiger"},
    };

    private BindingSource bs;
    private void Form1_Load(object sender, EventArgs e)
    {
        bs = new BindingSource(items, string.Empty);
        dataGridView1.DataSource = bs;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        if (bs.Count <= 1) return; // one or zero elements

        int position = bs.Position;
        if (position <= 0) return;  // already at top

        bs.RaiseListChangedEvents = false;

        MyItem current = (MyItem)bs.Current;
        bs.Remove(current);

        position--;

        bs.Insert(position, current);
        bs.Position = position;

        bs.RaiseListChangedEvents = true;
        bs.ResetBindings(false);
    }

    private void button2_Click(object sender, EventArgs e)
    {
        if (bs.Count <= 1) return; // one or zero elements

        int position = bs.Position;
        if (position == bs.Count - 1) return;  // already at bottom

        bs.RaiseListChangedEvents = false;

        MyItem current = (MyItem)bs.Current;
        bs.Remove(current);

        position++;

        bs.Insert(position, current);
        bs.Position = position;

        bs.RaiseListChangedEvents = true;
        bs.ResetBindings(false);
    }

    public class MyItem
    {
        public int Id { get; set; }
        public String Name { get; set; }
    }

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