Question

我有几个textboxes，我希望光标使用箭头键从一个textbox移动到另一个{。

我该怎么做？

看起来像这样，水龙头垂直移动也很奇怪。

感谢。 enter image description here

Answer 1

如果文本框中有一些文字，则以下解决方案有效。

首先创建一个KeyDown事件处理程序：

   private void textBoxLeft_KeyDown(object sender, KeyEventArgs e)
   {
     if (e.KeyCode.Equals(Keys.Right))
     {
       e.Handled = true;
       //SendKeys.Send("{TAB}");
       textBoxRight.Focus();
     }
   }
   private void textBoxRight_KeyDown(object sender, KeyEventArgs e)
   {
    if (e.KeyCode.Equals(Keys.Left))
    {
      e.Handled = true;
     //SendKeys.Send("+{TAB}");
     textBoxLeft.Focus();
    }
 }

Answer 2

您可以覆盖表单的ProcessCmdKey函数，并按下按键并关注其中的文本框。

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 TextBoxes
{
    public partial class Form1 : Form
    {

        List<TextBox[]> _textBoxes;
        public Form1()
        {
            InitializeComponent();

            //Getting a 2 dimentional structure to hold textboxes
            this._textBoxes= new List<TextBox[]>();

            TextBox[] row1 = new TextBox[4];
            row1[0] = textBox1;
            row1[1] = textBox2;
            row1[2] = textBox3;
            row1[3] = textBox4;

            TextBox[] row2 = new TextBox[4];
            row2[0] = textBox5;
            row2[1] = textBox6;
            row2[2] = textBox7;
            row2[3] = textBox8;

            TextBox[] row3 = new TextBox[4];
            row3[0] = textBox9;
            row3[1] = textBox10;
            row3[2] = textBox11;
            row3[3] = textBox12;

            TextBox[] row4 = new TextBox[4];
            row4[0] = textBox13;
            row4[1] = textBox14;
            row4[2] = textBox15;
            row4[3] = textBox16;

            this._textBoxes.Add(row1);
            this._textBoxes.Add(row2);
            this._textBoxes.Add(row3);
            this._textBoxes.Add(row4);



        }

         /// <summary>
         /// Processes a command key.
         /// </summary>
         /// <param name="msg">A <see cref="T:System.Windows.Forms.Message"/>, passed by reference, that represents the Win32 message to process.</param>
         /// <param name="keyData">One of the <see cref="T:System.Windows.Forms.Keys"/> values that represents the key to process.</param>
         /// <returns>
         /// true if the keystroke was processed and consumed by the control; otherwise, false to allow further processing.
         /// </returns>
        protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
        {
            //A key was pressed! 
            Control activeCtrl = this.ActiveControl;
            TextBox txb = activeCtrl as TextBox;
            //Handle it only if it was sent when a textbox was focused
            if (txb != null)
            {
                int row;
                int column;
                //find out which text box is currently active
                this.GetTextBoxIndexes(txb, out row, out column);

                //change indexes according to key stroke
                if (keyData == Keys.Up)
                {
                    row--;
                }
                else if (keyData == Keys.Down)
                {
                    row++;
                }
                else if (keyData == Keys.Left)
                {
                    column--;
                }
                else if (keyData == Keys.Right)
                {
                    column++;
                }
                //Make sure we are not in negative / out of ranfe index
                row = Math.Abs(row + 4) % 4;
                column = Math.Abs(column + 4) % 4;

                //focus requested text box
                TextBox slected = this._textBoxes[row][column];
                slected.Focus();

            }
            //don't forget not to break the chain...
            return base.ProcessCmdKey(ref msg, keyData);


        }

        /// <summary>
        /// Gets the text box indexes.
        /// </summary>
        /// <param name="txb">The texbox.</param>
        /// <param name="row">The out row index.</param>
        /// <param name="column">The out column index.</param>
        private void GetTextBoxIndexes(TextBox txb, out int row, out int column)
        {
            row = -1;
            column = -1;
            for (int rowIdx = 0; rowIdx < this._textBoxes.Count; rowIdx++)
            {
                TextBox[] currRow = this._textBoxes[rowIdx];
                for (int colIdx = 0; colIdx < currRow.Length; colIdx++)
                {
                    TextBox currTextBox = this._textBoxes[rowIdx][colIdx];
                    if (currTextBox.Equals(txb))
                    {
                        row = rowIdx;
                        column = colIdx;
                        return;
                    }
                }
            }
        }
    }
}

Answer 3

创造性地将它从头顶上移开。这将为您提供您想要的。

步骤1创建一个TableLayoutPanel并创建第4列和第5行。删除所有原始文本框和第2步将此添加到您的代码中。

    TextBox[] text = new TextBox[20]; //these are your new textboxes
    private void Form1_Load(object sender, EventArgs e)
    {
        for(int i=0; i<text.Length;i++) text[i] = new TextBox() {Text="0"}; //initialize each textbox
        tableLayoutPanel1.Controls.AddRange(text); //add textboxes to the tablelayoutpanel
        for(int i = 0; i<tableLayoutPanel1.Controls.Count;i++) //add everything in the tablelayoutpanel to the same keydown event
        tableLayoutPanel1.Controls[i].KeyDown+=new KeyEventHandler(tableLayoutPanel1_KeyDown);
    }

    void tableLayoutPanel1_KeyDown(object sender, KeyEventArgs e)
    { // this moves the box focus up down left or right 
        if (e.KeyData == Keys.Left)
            for (int i = 0; i < text.Length; i++)
            {
                if (sender.Equals(text[i]))
                { text[i - 1 < 0 ? text.Length - 1 : i - 1].Focus(); break; }
            }
         else if (e.KeyData == Keys.Right)
            for (int i = 0; i < text.Length; i++)
            {
                if (sender.Equals(text[i]))
                { text[i + 1 > text.Length - 1 ? 0 : i + 1].Focus(); break; }
            }
         else if (e.KeyData == Keys.Up)
             for (int i = 0; i < text.Length; i++)
             {
                 if (sender.Equals(text[i]))
                 { text[i - 4 < 0 ? i - 4 + text.Length : i - 4].Focus(); break; }
             }
         else if (e.KeyData == Keys.Down)
             for (int i = 0; i < text.Length; i++)
             {
                 if (sender.Equals(text[i]))
                 { text[i + 4 > text.Length - 1 ? i + 4 - text.Length : i + 4].Focus(); break; }
             }
    }

这将允许您使用箭头键向上向上导航，它将使用选项卡修复您的问题，因此选项卡现在将向右移动并且shift + tab将返回。此外，这个解决方案很不错，因为如果你上下移动它会像你直觉所期望的那样循环回来。此外，如果你感觉很兴奋，你现在可以对角移动。

Answer 4

尝试处理按键事件
→，←可以分别强制标签，移动+标签键。我只是一个粗略的想法，因为我从未尝试过这个。

如何使用箭头在文本框之间移动光标？

4 个答案: