Clear text on pressing escape key

Question

Clear text on pressing escape key

vijay kumar 120

I am a new learner in c# and windows forms . I, in my org . have created a custom datagridview . it has four columns . but i am stuck at a task in which on presses escape key in the first three columns ,whatever data we have typed in , we need to clear it out . Also we need to made sure that column 2 and 3 can only numeric values and must be non negative with only allowing two digits after decimal point .

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KOZ6.0 6,580

In DataGridView, Escape key is used to cancel editing. Let's assign it to another key.

vijay kumar 120 Reputation points

2023-10-07T08:04:41.6833333+00:00

@KOZ6.0 , in which event ? and how to assign the keys . please share example
KOZ6.0 6,580 Reputation points

2023-10-07T11:08:49.21+00:00

「DataGridView.ProcessDataGridViewKey」 https://referencesource.microsoft.com/#System.Windows.Forms/winforms/Managed/System/WinForms/DataGridViewMethods.cs,78454596c1cbe0ae

KOZ6.0 6,580

The following is an example of assigning CTRL+K to the clear key.

using System;
using System.Windows.Forms;

public class DataGridViewTextBioxExColumn : DataGridViewTextBoxColumn
{
    internal const char CTR_K = '\x0b';

    public DataGridViewTextBioxExColumn()  {
        base.CellTemplate = new DataGridViewTextBioxExCell();
    }
}

public class DataGridViewTextBioxExCell : DataGridViewTextBoxCell
{
    protected override void OnKeyPress(KeyPressEventArgs e, int rowIndex) {
        if (e.KeyChar == DataGridViewTextBioxExColumn.CTR_K) {
            Value = string.Empty;
            e.Handled = true;
        }
        base.OnKeyPress(e, rowIndex);
    }

    public override Type EditType => typeof(DataGridViewTextBoxExEditingControl);
}

public class DataGridViewTextBoxExEditingControl : DataGridViewTextBoxEditingControl
{
    protected override void OnKeyPress(KeyPressEventArgs e) {
        if (e.KeyChar == DataGridViewTextBioxExColumn.CTR_K) {
            Clear();
            e.Handled = true;
        }
        base.OnKeyPress(e);
    }
}

KOZ6.0 6,580 Reputation points

2023-10-11T10:02:04.8666667+00:00

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Clear text on pressing escape key

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