C# InputBox控件源码

C#语言基础

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开发语言：C#
实例大小：1.96KB
下载次数：36
浏览次数：586
发布时间：2013-10-03
实例类别：C#语言基础
发布人：crazycode
文件格式：.zip
所需积分：2

实例介绍

【实例简介】
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【核心代码】

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
 
namespace WindowsApplication1
{
 
    #region InputBox return result
 
    /// <summary>
    /// Class used to store the result of an InputBox.Show message.
    /// </summary>
    public class InputBoxResult 
    {
        public DialogResult ReturnCode;
        public string Text;
    }
 
    #endregion
 
    /// <summary>
    /// Summary description for InputBox.
    /// </summary>
    public class InputBox
    {
 
        #region Private Windows Contols and Constructor
 
        // Create a new instance of the form.
        private static Form frmInputDialog;
        private static Label lblPrompt;
        private static Button btnOK;
        private static Button btnCancel;
        private static TextBox txtInput;
 
        public InputBox()
        {
        }
 
        #endregion
 
        #region Private Variables
 
        private static string _formCaption = string.Empty;
        private static string _formPrompt = string.Empty;
        private static InputBoxResult _outputResponse = new InputBoxResult();
        private static string _defaultValue = string.Empty;
        private static int _xPos = -1;
        private static int _yPos = -1;
 
        #endregion
 
        #region Windows Form code
 
        private static void InitializeComponent()
        {
            // Create a new instance of the form.
            frmInputDialog = new Form();
            lblPrompt = new Label();
            btnOK = new Button();
            btnCancel = new Button();
            txtInput = new TextBox();
            frmInputDialog.SuspendLayout();
            // 
            // lblPrompt
            // 
            lblPrompt.Anchor = ((AnchorStyles)((((AnchorStyles.Top | AnchorStyles.Bottom) | AnchorStyles.Left) | AnchorStyles.Right)));
            lblPrompt.BackColor = SystemColors.Control;
            lblPrompt.Font = new Font("Microsoft Sans Serif", 8.25F, FontStyle.Regular, GraphicsUnit.Point, ((Byte)(0)));
            lblPrompt.Location = new Point(12, 9);
            lblPrompt.Name = "lblPrompt";
            lblPrompt.Size = new Size(302, 82);
            lblPrompt.TabIndex = 3;
            // 
            // btnOK
            // 
            btnOK.DialogResult = DialogResult.OK;
            btnOK.FlatStyle = FlatStyle.Popup;
            btnOK.Location = new Point(326, 8);
            btnOK.Name = "btnOK";
            btnOK.Size = new Size(64, 24);
            btnOK.TabIndex = 1;
            btnOK.Text = "&OK";
            btnOK.Click  = new EventHandler(btnOK_Click);
            // 
            // btnCancel
            // 
            btnCancel.DialogResult = DialogResult.Cancel;
            btnCancel.FlatStyle = FlatStyle.Popup;
            btnCancel.Location = new Point(326, 40);
            btnCancel.Name = "btnCancel";
            btnCancel.Size = new Size(64, 24);
            btnCancel.TabIndex = 2;
            btnCancel.Text = "&Cancel";
            btnCancel.Click  = new EventHandler(btnCancel_Click);
            // 
            // txtInput
            // 
            txtInput.Location = new Point(8, 100);
            txtInput.Name = "txtInput";
            txtInput.Size = new Size(379, 20);
            txtInput.TabIndex = 0;
            txtInput.Text = "";
            // 
            // InputBoxDialog
            // 
            frmInputDialog.AutoScaleBaseSize = new Size(5, 13);
            frmInputDialog.ClientSize = new Size(398, 128);
            frmInputDialog.Controls.Add(txtInput);
            frmInputDialog.Controls.Add(btnCancel);
            frmInputDialog.Controls.Add(btnOK);
            frmInputDialog.Controls.Add(lblPrompt);
            frmInputDialog.FormBorderStyle = FormBorderStyle.FixedDialog;
            frmInputDialog.MaximizeBox = false;
            frmInputDialog.MinimizeBox = false;
            frmInputDialog.Name = "InputBoxDialog";
            frmInputDialog.ResumeLayout(false);
        }
 
        #endregion
 
        #region Private function, InputBox Form move and change size
 
        static private void LoadForm()
        {
            OutputResponse.ReturnCode = DialogResult.Ignore;
            OutputResponse.Text = string.Empty;
 
            txtInput.Text = _defaultValue;
            lblPrompt.Text = _formPrompt;
            frmInputDialog.Text = _formCaption;
 
            // Retrieve the working rectangle from the Screen class
            // using the PrimaryScreen and the WorkingArea properties.
            System.Drawing.Rectangle workingRectangle = Screen.PrimaryScreen.WorkingArea;
 
            if((_xPos >= 0 && _xPos < workingRectangle.Width-100) && (_yPos >= 0 && _yPos < workingRectangle.Height-100))
            {
                frmInputDialog.StartPosition = FormStartPosition.Manual;
        frmInputDialog.Location = new System.Drawing.Point(_xPos, _yPos);
            }
            else
                frmInputDialog.StartPosition = FormStartPosition.CenterScreen;
 
 
            string PrompText = lblPrompt.Text;
 
            int n = 0;
            int Index = 0;
            while(PrompText.IndexOf("\n",Index) > -1)
            {
                Index = PrompText.IndexOf("\n",Index) 1;
                n  ;
            }
 
            if( n == 0 )
                n = 1;
 
            System.Drawing.Point Txt = txtInput.Location; 
            Txt.Y = Txt.Y   (n*4);
            txtInput.Location = Txt; 
            System.Drawing.Size form = frmInputDialog.Size; 
            form.Height = form.Height   (n*4);
            frmInputDialog.Size = form; 
 
            txtInput.SelectionStart = 0;
            txtInput.SelectionLength = txtInput.Text.Length;
            txtInput.Focus();
        }
 
        #endregion
 
        #region Button control click event
 
        static private void btnOK_Click(object sender, System.EventArgs e)
        {
            OutputResponse.ReturnCode = DialogResult.OK;
            OutputResponse.Text = txtInput.Text;
            frmInputDialog.Dispose();
        }
 
        static private void btnCancel_Click(object sender, System.EventArgs e)
        {
            OutputResponse.ReturnCode = DialogResult.Cancel;
            OutputResponse.Text = string.Empty; //Clean output response
            frmInputDialog.Dispose();
        }
 
        #endregion
 
        #region Public Static Show functions
 
        static public InputBoxResult Show(string Prompt)
        {
            InitializeComponent();
            FormPrompt = Prompt;
 
            // Display the form as a modal dialog box.
            LoadForm();
            frmInputDialog.ShowDialog();
            return OutputResponse;
        }
 
        static public InputBoxResult Show(string Prompt,string Title)
        {
            InitializeComponent();
 
            FormCaption = Title;
            FormPrompt = Prompt;
 
            // Display the form as a modal dialog box.
            LoadForm();
            frmInputDialog.ShowDialog();
            return OutputResponse;
        }
 
        static public InputBoxResult Show(string Prompt,string Title,string Default)
        {
            InitializeComponent();
 
            FormCaption = Title;
            FormPrompt = Prompt;
            DefaultValue = Default;
 
            // Display the form as a modal dialog box.
            LoadForm();
            frmInputDialog.ShowDialog();
            return OutputResponse;
        }
 
        static public InputBoxResult Show(string Prompt,string Title,string Default,int XPos,int YPos)
        {
            InitializeComponent();
            FormCaption = Title;
            FormPrompt = Prompt;
            DefaultValue = Default;
            XPosition = XPos;
            YPosition = YPos;
 
            // Display the form as a modal dialog box.
            LoadForm();
            frmInputDialog.ShowDialog();
            return OutputResponse;
        }
 
        #endregion
 
        #region Private Properties
 
        static private string FormCaption
        {
            set
            {
                _formCaption = value;
            }
        } // property FormCaption
         
        static private string FormPrompt
        {
            set
            {
                _formPrompt = value;
            }
        } // property FormPrompt
         
        static private InputBoxResult OutputResponse
        {
            get
            {
                return _outputResponse;
            }
            set
            {
                _outputResponse = value;
            }
        } // property InputResponse
         
        static private string DefaultValue
        {
            set
            {
                _defaultValue = value;
            }
        } // property DefaultValue
 
        static private int XPosition
        {
            set
            {
                if( value >= 0 )
                    _xPos = value;
            }
        } // property XPos
 
        static private int YPosition
        {
            set
            {
                if( value >= 0 )
                    _yPos = value;
            }
        } // property YPos
 
        #endregion 
    }
}

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