C#自定义控件

Question

大家谁能帮我写个自定义控件
随便一个都行
简单点
谢谢了

Answer 1

你好！
     文档里已经有很详细的讲述了，希望对你有帮助：
http://msdn.microsoft.com/zh-cn/library/ms180794(VS.80).aspx

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周雪峰

Answer 2

// 控件 01 无功能-
public partial class ControlWithToolboxIcon : Control
{
    public ControlWithToolboxIcon()
    {
        InitializeComponent();
    }

    protected override void OnPaint(PaintEventArgs pe)
    {
        base.OnPaint(pe);
    }
}

//控件 02 DataGridView 扩展
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.ComponentModel;
using X.Library;

namespace X.WinFormsControl
{
    /// <summary>
    /// 标题：DataGridView 控件
    /// 日期：2009-04-22
    /// 描述：
    /// </summary>
    public class XGrid : DataGridView
    {
        private XGridOptionsGradient fOptionsGradient;
        private XGridOptionsView fOptionsView;

        public XGridOptionsGradient OptionsGradient
        {
            get { return fOptionsGradient; }
            set { fOptionsGradient = value; }
        }

        public XGridOptionsView OptionsView
        {
            get { return fOptionsView; }
            set
            {
                if (this.fOptionsView.ShowRowNumber != value.ShowRowNumber)
                {
                    this.fOptionsView.ShowRowNumber = value.ShowRowNumber;
                }

                if (this.fOptionsView.ShowGradient != value.ShowGradient)
                {
                    this.fOptionsView.ShowGradient = value.ShowGradient;
                }

                if (this.fOptionsView.ColumnAutoWith != value.ColumnAutoWith)
                {
                    this.fOptionsView.ColumnAutoWith = value.ColumnAutoWith;
                    if (this.fOptionsView.ColumnAutoWith == DefaultBoolean.Default||
                        this.fOptionsView.ColumnAutoWith == DefaultBoolean.True)
                        this.UpdateAutoSizeColumnMode(DataGridViewAutoSizeColumnMode.Fill);
                    else
                        this.UpdateAutoSizeColumnMode(DataGridViewAutoSizeColumnMode.None);
                }
            }
        }

        public XGrid()
        {
            this.InitClass();
        }

        protected virtual void InitClass()
        {
            this.fOptionsView = new XGridOptionsView();
            this.fOptionsGradient = new XGridOptionsGradient();

            Padding fPadding = new Padding(0, 1, 0, this.fOptionsGradient.RowHeight);
            this.RowTemplate.DefaultCellStyle.Padding = fPadding;
            //把整行背景色设为透明（若不这样就不能渐变）
            this.RowTemplate.DefaultCellStyle.SelectionBackColor = Color.Transparent;
            this.RowTemplate.Height += this.fOptionsGradient.RowHeight;
            this.AllowUserToAddRows = false;
            this.EditMode = DataGridViewEditMode.EditOnKeystrokeOrF2;
            this.CellBorderStyle = DataGridViewCellBorderStyle.None;
            this.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
            this.AutoResizeRows(DataGridViewAutoSizeRowsMode.AllCellsExceptHeaders);

            #region " Events "
            //列宽时重画
            base.ColumnWidthChanged += new DataGridViewColumnEventHandler(XDataGridView_ColumnWidthChanged);
            base.RowPrePaint += new DataGridViewRowPrePaintEventHandler(XDataGridView_RowPrePaint); // Generate Row Gradient
            base.RowPostPaint += new DataGridViewRowPostPaintEventHandler(XDataGridView_RowPostPaint); // Generate Row Number
            #endregion

            //禁止修改
            this.ReadOnly = true;
            this.Dock = DockStyle.Fill;
        }

        #region " Generate Row Gradient "

        private void XDataGridView_RowPrePaint(object sender, DataGridViewRowPrePaintEventArgs e)
        {
            // Generate Row Gradient
            // 如果按下面那样写的话，就没有数据直奇怪
            // e.PaintParts &= DataGridViewPaintParts.Focus;
            e.PaintParts &= ~DataGridViewPaintParts.Focus;

            if ((e.State & DataGridViewElementStates.Selected) ==
                DataGridViewElementStates.Selected)
            {
                Rectangle rowBounds = new Rectangle(
                    this.RowHeadersWidth, e.RowBounds.Top,
                    this.Columns.GetColumnsWidth(
                    DataGridViewElementStates.Visible) -
                    this.HorizontalScrollingOffset + 1,
                    e.RowBounds.Height);

                using (Brush backbrush =
                    new System.Drawing.Drawing2D.LinearGradientBrush(rowBounds,
                    this.fOptionsGradient.Color1, 
                    this.fOptionsGradient.Color2, 
                    System.Drawing.Drawing2D.LinearGradientMode.Horizontal))
                {
                    e.Graphics.FillRectangle(backbrush, rowBounds);
                }
            }
        }

        #endregion

        #region " Generate Row Number "

        private void XDataGridView_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e)
        {
            if (this.OptionsView.ShowRowNumber == DefaultBoolean.Default||
                this.OptionsView.ShowRowNumber == DefaultBoolean.True)
            {
                // Generate Row Number
                using (SolidBrush b = new SolidBrush(RowHeadersDefaultCellStyle.ForeColor))
                {
                    /*
                    e.Graphics.DrawString(e.RowIndex.ToString(
                        System.Globalization.CultureInfo.CurrentUICulture), 
                        e.InheritedRowStyle.Font, b,
                        e.RowBounds.Location.X + 20, 
                        e.RowBounds.Location.Y + 4);
                     */

                    e.Graphics.DrawString((e.RowIndex + 1).ToString(),
                        e.InheritedRowStyle.Font, b,
                        e.RowBounds.Location.X + 16,
                        e.RowBounds.Location.Y + 4);
                }
            }
        }

        #endregion

        private void XDataGridView_ColumnWidthChanged(object sender, DataGridViewColumnEventArgs e)
        {
            if (this.OptionsView.ShowGradient == DefaultBoolean.Default ||
                this.OptionsView.ShowGradient == DefaultBoolean.True)
                this.Invalidate();
        }

        #region " ColumnAutoWith "

        protected override void OnDataBindingComplete(DataGridViewBindingCompleteEventArgs e)
        {
            base.OnDataBindingComplete(e);

            if (this.fOptionsView.ColumnAutoWith == DefaultBoolean.Default ||
                this.fOptionsView.ColumnAutoWith == DefaultBoolean.True)
                this.UpdateAutoSizeColumnMode(DataGridViewAutoSizeColumnMode.Fill);
        }

        #endregion

        #region " Best Fit Columns "
        /// <summary>
        /// 设置所有列为最佳列宽
        /// </summary>
        public virtual void BestFitColumns()
        {
            this.UpdateAutoSizeColumnMode(DataGridViewAutoSizeColumnMode.DisplayedCells);
        }

        #endregion

        public virtual void UpdateAutoSizeColumnMode(DataGridViewAutoSizeColumnMode fAutoSizeColumnMode)
        {
            foreach (DataGridViewColumn fColumn in this.Columns)
                fColumn.AutoSizeMode = fAutoSizeColumnMode;
        }
    }
}

using System.Drawing;

namespace X.WinFormsControl
{
    /// <summary>
    /// 标题：DataGridView 行渐变颜色
    /// 日期：2009-04-22
    /// </summary>
    public class XGridOptionsGradient
    {
        private Color fColor1;
        private Color fColor2;
        public int fRowHeight = 0;

        /// <summary>
        /// 获取或设置一个值，它表示渐变起始色的 Color 结构。
        /// </summary>
        public Color Color1
        {
            get { return fColor1; }
            set { fColor1 = value; }
        }

        /// <summary>
        /// 获取或设置一个值，它表示渐变起结束的 Color 结构。
        /// </summary>
        public Color Color2
        {
            get { return fColor2; }
            set { fColor2 = value; }
        }

        public int RowHeight
        {
            get { return fRowHeight; }
            set { fRowHeight = value; }
        }

        /// <summary>
        /// 初始化 XGridOptionsGradient
        /// </summary>
        public XGridOptionsGradient() : this(ColorTranslator.FromHtml("#06B4F3"), ColorTranslator.FromHtml("#0044C1")) { }
        public XGridOptionsGradient(Color fColor1, Color fColor2) : this(fColor1, fColor2, 0) { }
        /// <summary>
        /// 初始化 XGridOptionsGradient
        /// </summary>
        /// <param name="fColor1">渐变起始色的 Color 结构</param>
        /// <param name="fColor2">渐变起结束的 Color 结构</param>
        public XGridOptionsGradient(Color fColor1, Color fColor2, int fRowHeight)
        {
            this.fColor1 = fColor1;
            this.fColor2 = fColor2;
            this.fRowHeight = fRowHeight;
        }
    }
}

using X.Library;

namespace X.WinFormsControl
{
    /// <summary>
    /// 标题：XGrid 控制默认参数类
    /// 日期：2009-04-22
    /// 描述：
    /// </summary>
    public class XGridOptionsView
    {
        private DefaultBoolean fShowRowNumber;
        private DefaultBoolean fShowGradient;
        private DefaultBoolean fColumnAutoWith;

        /// <summary>
        /// 获取或设置一个值，它表示是否为每一行数据显示行号
        /// </summary>
        public DefaultBoolean ShowRowNumber
        {
            get { return fShowRowNumber; }
            set { fShowRowNumber = value; }
        }

        /// <summary>
        /// 获取或设置一个值，它表未是否在行上显示渐变色彩
        /// </summary>
        public DefaultBoolean ShowGradient
        {
            get { return fShowGradient; }
            set { fShowGradient = value; }
        }

        /// <summary>
        /// 获取或设置一个值，它表未所有列是否自动调整最佳宽度
        /// </summary>
        public DefaultBoolean ColumnAutoWith
        {
            get { return fColumnAutoWith; }
            set { fColumnAutoWith = value; }
        }

        public XGridOptionsView() : this(DefaultBoolean.Default, DefaultBoolean.Default, DefaultBoolean.Default) { }
        public XGridOptionsView(DefaultBoolean fShowRowNumber, DefaultBoolean fShowGradient, DefaultBoolean fColumnAutoWith)
        {
            this.fShowRowNumber = fShowRowNumber;
            this.fShowGradient = fShowGradient;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace X.Library
{
    public enum DefaultBoolean
    {
        Default,
        True,
        False
    }
}

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