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on enter key copy cell values from previous row

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GridView
This is a migrated thread and some comments may be shown as answers.
Andrea
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Andrea asked on 14 Aug 2015, 03:12 PM

Hi,
to facilitate and speed up insert row, when user press enter key all blank cell in current row must be copied from same cell (same column) of previous row.

At the begin the grid is blank, it not have datasource but only template for columns, user can add row by new row grid feature.

I have some problem when the edit row is the new row (not jet added to rows grid collection) and cell is in edit mode.
I try to create a custom GridBehavior to do this, but if row in edit is the new row i can't access it.

Thank you very much.

 

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Andrea
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answered on 15 Aug 2015, 09:24 AM

<code> 

private void radGridView1_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
GridViewRowInfo currRow = radGridView1.CurrentRow;
GridViewRowInfo prevRow = null;
if (radGridView1.GridNavigator.SelectPreviousRow(1))
prevRow = radGridView1.CurrentRow;
CopyCellFromPrevRow(prevRow, currRow);
radGridView1.GridNavigator.SelectRow(currRow);
radGridView1.GridNavigator.SelectNextRow(1);
radGridView1.GridNavigator.SelectFirstColumn();
}
}

private void radGridView1_UserAddedRow(object sender, GridViewRowEventArgs e)
{
if (editorEnter)
{
GridViewRowInfo from = null;
if (radGridView1.GridNavigator.SelectRow(e.Row))
{
if (radGridView1.GridNavigator.SelectPreviousRow(1))
from = radGridView1.CurrentRow;
}
CopyCellFromPrevRow(from, e.Row);
radGridView1.GridNavigator.SelectRow(e.Row);
radGridView1.GridNavigator.SelectNextRow(1);
radGridView1.GridNavigator.SelectFirstColumn();
}
editorEnter = false;
}
private void radGridView1_CellBeginEdit(object sender, GridViewCellCancelEventArgs e)
{
//This Event Handler applies to columns of type GridViewTextBoxColumn
RadTextBoxEditor activeEditor = e.ActiveEditor as RadTextBoxEditor;
if (activeEditor != null)
{
RadEditorElement editor = activeEditor.EditorElement as RadEditorElement;
if (editor != null)
{
editor.KeyDown += editor_KeyDown;
}
}

}
void editor_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
editorEnter = true;
}
}

private void CopyCellFromPrevRow(GridViewRowInfo from, GridViewRowInfo to)
{
if (!(from != null && to != null && from != to))
return;
// copy cell by cell
foreach (GridViewCellInfo cell in from.Cells)
{
var valPrev = cell.Value;
var valCurr = to.Cells[cell.ColumnInfo.Name].Value;
if (valPrev != null && valCurr == null)
to.Cells[cell.ColumnInfo.Name].Value = valPrev;
}
}

</code>

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Dimitar
Telerik team
answered on 17 Aug 2015, 02:17 PM
Hello Andrea,

Thank you for writing.

Actually pressing Enter in the new row will add it to the grid and you do not need to check if Enter is pressed. This will trigger UserAddedRow event and you just need to copy the cells. For example, the following code is working fine on my side:
public partial class RadForm1 : Telerik.WinControls.UI.RadForm
{
    public RadForm1()
    {
        InitializeComponent();
        for (int i = 0; i < 4; i++)
        {
            radGridView1.Columns.Add("col" + i);
  
        }
        radGridView1.Rows.Add("cell 1", "cell 2", "cell 3", "cell 4");
        radGridView1.UserAddedRow += radGridView1_UserAddedRow;
    }
  
    void radGridView1_UserAddedRow(object sender, Telerik.WinControls.UI.GridViewRowEventArgs e)
    {
        GridViewRowInfo from = null;
        if (radGridView1.GridNavigator.SelectRow(e.Row))
        {
            if (radGridView1.GridNavigator.SelectPreviousRow(1))
                from = radGridView1.CurrentRow;
        }
        CopyCellFromPrevRow(from, e.Row);
        radGridView1.GridNavigator.SelectRow(e.Row);
        radGridView1.GridNavigator.SelectNextRow(1);
        radGridView1.GridNavigator.SelectFirstColumn();
    }
  
    private void CopyCellFromPrevRow(GridViewRowInfo from, GridViewRowInfo to)
    {
        if (!(from != null && to != null && from != to))
            return;
        // copy cell by cell
        foreach (GridViewCellInfo cell in from.Cells)
        {
            var valPrev = cell.Value;
  
            var valCurr = to.Cells[cell.ColumnInfo.Name].Value;
            if (valPrev != null && valCurr == null)
                to.Cells[cell.ColumnInfo.Name].Value = valPrev;
        }
    }
}

I hope this helps.

Regards,
Dimitar
Telerik
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Andrea
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Answers by
Andrea
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