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怎么在DataGridView中實現(xiàn)右鍵菜單自定義顯示及隱藏列功能?針對這個問題,這篇文章詳細(xì)介紹了相對應(yīng)的分析和解答,希望可以幫助更多想解決這個問題的小伙伴找到更簡單易行的方法。

1、新建一個自定義控件,命名為:PopupMenuControl。
2、在PopupMenuControl.Designet文件中的InitializeComponent()方法下面,注冊以下事件:
this.Paint += new System.Windows.Forms.PaintEventHandler(this.PopupMenuControl_Paint); this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.PopupMenuControl_MouseDown); this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.PopupMenuControl_MouseMove);
3、PopupMenuControl的代碼:
public partial class PopupMenuControl : UserControl
{ public delegate void CheckedChanged(int hitIndex, bool isChecked); //勾選改變委托
public event CheckedChanged CheckedChangedEvent; //勾選改變事件
PopupMenuHelper popupMenuHelper = null; //菜單幫助類,主要負(fù)責(zé)菜單繪制。
public PopupMenuControl()
{
InitializeComponent();
}
public void Initialize(DataGridView dgvTarget)
{
//菜單幫助類實例化
popupMenuHelper = new PopupMenuHelper();
//將列標(biāo)題添加到items
foreach (DataGridViewColumn column in dgvTarget.Columns)
{
popupMenuHelper.AddItem(column.HeaderText, column.Visible);
}
//菜單繪制
popupMenuHelper.Prepare(CreateGraphics());
Width = popupMenuHelper.Width;
Height = popupMenuHelper.Height;
}
///
/// 繪制
///
///
///
private void PopupMenuControl_Paint(object sender, PaintEventArgs e)
{
popupMenuHelper.Draw(e.Graphics);
}
///
/// 鼠標(biāo)移過
///
///
///
private void PopupMenuControl_MouseMove(object sender, MouseEventArgs e)
{
if (popupMenuHelper.IsMouseMove(e.X, e.Y))
{
popupMenuHelper.Draw(CreateGraphics());
}
}
///
/// 鼠標(biāo)按下
///
///
///
private void PopupMenuControl_MouseDown(object sender, MouseEventArgs e)
{
if (popupMenuHelper.IsMouseDown(e.X, e.Y))
{
int hitIndex = popupMenuHelper.HitIndex;
if (hitIndex != -1)
{
bool isChecked = popupMenuHelper.IsCheckedChange(hitIndex, CreateGraphics());
OnCheckedChanged(hitIndex, isChecked);
}
}
}
///
/// 勾選改變
///
///
///
public virtual void OnCheckedChanged(int hitIndex, bool isChecked)
{
CheckedChangedEvent?.Invoke(hitIndex, isChecked);
}
}4、這上面涉及到一個PopupMenuHelper的幫助類,此幫助類主要是為PopupMenuControl控件實現(xiàn)菜單繪制的功能,其代碼如下:
class PopupMenuHelper
{
//變量
private PopupMenuItem hotItem = null; //當(dāng)前Item
private List items = new List(); //Item集合
private Bitmap bitmap; //位圖
private Graphics graphics; //圖像
private static readonly int BasicConst = 24; //Item:高度、Image寬度
private static readonly int BasicGap = 3; //四周間距
private static readonly int BasicRows = 3; //較大行數(shù)
private static readonly int BasicSide = 10; //Item:CheckBox邊長(建議用偶數(shù))
private int totality = 1; //分割總數(shù)
private int[] eachWidth = null; //各個寬度
//屬性
public int Width { get { return bitmap.Width; } } //寬度
public int Height { get { return bitmap.Height; } } //高度
//PopupMenuItem類
private class PopupMenuItem
{
//屬性
public string ItemText { get; set; } //Item文本
public bool IsChecked { get; set; } //勾選狀態(tài)
//構(gòu)造函數(shù)
public PopupMenuItem(string itemText) : this(itemText, false)
{
}
public PopupMenuItem(string itemText, bool isChecked)
{
ItemText = itemText;
IsChecked = isChecked;
}
}
//無參構(gòu)造函數(shù)
public PopupMenuHelper()
{
}
///
/// 被點擊Item的Index
///
public int HitIndex
{
get
{
return items.IndexOf(hotItem);
}
}
///
/// 勾選改變狀態(tài)
///
/// 被點擊Item的Index
/// 圖像
///
public bool IsCheckedChange(int hitIndex, Graphics g)
{
items[hitIndex].IsChecked = !items[hitIndex].IsChecked;
Draw(g);
return items[hitIndex].IsChecked;
}
///
/// 添加Item
///
/// Item文本
/// Item勾選狀態(tài)
public void AddItem(string itemText, bool isChecked)
{
items.Add(new PopupMenuItem(itemText, isChecked));
}
///
/// 繪制菜單準(zhǔn)備
///
/// 圖像
public void Prepare(Graphics g)
{
//獲取菜單的寬度及高度
totality = (int)Math.Ceiling((double)items.Count / BasicRows);
eachWidth = new int[totality];
int totalWidth = 0, totalHeight = 0;
double maxTextWidth = 0;
if (totality == 1)
{
totalHeight = items.Count * BasicConst + 2 * BasicGap;
foreach (PopupMenuItem item in items)
{
//SizeF:存儲有序浮點數(shù)對,通常為矩形的寬度和高度。
SizeF sizeF = g.MeasureString(item.ItemText, SystemInformation.MenuFont);
maxTextWidth = Math.Max(maxTextWidth, sizeF.Width);
}
totalWidth = (int)Math.Ceiling((double)maxTextWidth) + BasicConst + 2 * BasicGap;
eachWidth[0] = (int)Math.Ceiling((double)maxTextWidth) + BasicConst;
}
else
{
totalHeight = BasicRows * BasicConst + 2 * BasicGap;
int rows = 0, cols = 1;
foreach (PopupMenuItem item in items)
{
rows++;
//SizeF:存儲有序浮點數(shù)對,通常為矩形的寬度和高度。
SizeF sizeF = g.MeasureString(item.ItemText, SystemInformation.MenuFont);
maxTextWidth = Math.Max(maxTextWidth, sizeF.Width);
if (cols < totality)
{
//1..[totality-1]列
if (rows == BasicRows)
{
totalWidth += (int)Math.Ceiling((double)maxTextWidth) + BasicConst;
eachWidth[cols - 1] = (int)Math.Ceiling((double)maxTextWidth) + BasicConst;
maxTextWidth = 0;
cols++;
rows = 0;
}
}
else
{
//totality列
if ((cols - 1) * BasicRows + rows == items.Count)
{
totalWidth += (int)Math.Ceiling((double)maxTextWidth) + BasicConst + 2 * BasicGap;
eachWidth[cols - 1] = (int)Math.Ceiling((double)maxTextWidth) + BasicConst;
}
}
}
}
//圖像初始化
bitmap = new Bitmap(totalWidth, totalHeight);
graphics = Graphics.FromImage(bitmap);
}
///
/// 繪制菜單
///
///
public void Draw(Graphics g)
{
Rectangle area = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
graphics.Clear(SystemColors.Menu);
DrawBackground(graphics, area);
DrawItems(graphics);
g.DrawImage(bitmap, area, area, GraphicsUnit.Pixel);
}
///
/// 繪制菜單背景
///
///
///
private void DrawBackground(Graphics g, Rectangle area)
{
//描邊
using (Pen borderPen = new Pen(Color.FromArgb(112, 112, 112)))
g.DrawRectangle(borderPen, area);
//Image及Text
int left = BasicGap, top = BasicGap;
if (totality == 1)
{
Rectangle imageArea = new Rectangle(left, top, BasicConst, items.Count * BasicConst);
using (Brush backBrush = new SolidBrush(Color.FromArgb(240, 240, 240)))
g.FillRectangle(backBrush, imageArea);
Rectangle textArea = new Rectangle(left + BasicConst, top, eachWidth[0], items.Count * BasicConst);
using (Brush backBrush = new SolidBrush(Color.FromArgb(255, 255, 255)))
g.FillRectangle(backBrush, textArea);
}
else
{
for (int i = 0; i < totality; i++)
{
Rectangle imageArea = new Rectangle(left, top, BasicConst, BasicRows * BasicConst);
using (Brush backBrush = new SolidBrush(Color.FromArgb(240, 240, 240)))
g.FillRectangle(backBrush, imageArea);
Rectangle textArea = new Rectangle(left + BasicConst, top, eachWidth[i], BasicRows * BasicConst);
using (Brush backBrush = new SolidBrush(Color.FromArgb(255, 255, 255)))
g.FillRectangle(backBrush, textArea);
left += eachWidth[i];
}
}
}
///
/// 繪制所有菜單Item
///
/// 圖像
private void DrawItems(Graphics g)
{
int left = BasicGap, top = BasicGap;
int rows = 0, cols = 1;
foreach (PopupMenuItem item in items)
{
if (totality == 1)
{
DrawSingleItem(g, left, ref top, eachWidth[0], item, item == hotItem);
}
else
{
rows++;
DrawSingleItem(g, left, ref top, eachWidth[cols - 1], item, item == hotItem);
//1..[totality-1]列
if (rows % BasicRows == 0)
{
left += eachWidth[cols - 1];
top = BasicGap;
cols++;
rows = 0;
}
}
}
}
///
/// 繪制單個菜單Item
///
/// 圖像
/// 圖像Top
/// 菜單Item
/// 是否為當(dāng)前菜單Item
private void DrawSingleItem(Graphics g, int left, ref int top,int width, PopupMenuItem item, bool isHotItem)
{
//Item區(qū)域
Rectangle drawRect = new Rectangle(left, top, width, BasicConst);
top += BasicConst;
//Text區(qū)域
Rectangle itemTextArea = new Rectangle
(
drawRect.Left + BasicConst,
drawRect.Top,
drawRect.Width - BasicConst,
drawRect.Height
);
//背景色及描邊色
if (isHotItem)
{
//HotItem
Rectangle hotItemArea = new Rectangle(drawRect.Left, drawRect.Top, drawRect.Width, drawRect.Height);
using (SolidBrush backBrush = new SolidBrush(Color.FromArgb(214, 235, 255)))
g.FillRectangle(backBrush, hotItemArea);
using (Pen borderPen = new Pen(Color.FromArgb(51, 153, 255)))
g.DrawRectangle(borderPen, hotItemArea);
}
//Text處理
StringFormat itemTextFormat = new StringFormat();
//NoClip:允許顯示字形符號的伸出部分和延伸到矩形外的未換行文本。
//NoWrap:在矩形內(nèi)設(shè)置格式時,禁用自動換行功能。
itemTextFormat.FormatFlags = StringFormatFlags.NoClip | StringFormatFlags.NoWrap;
//Near:指定文本靠近布局對齊。
itemTextFormat.Alignment = StringAlignment.Near;
//Center:指定文本在布局矩形中居中對齊(呃,感覺不是很垂直居中,偏上了一些)。
itemTextFormat.LineAlignment = StringAlignment.Center;
//Show:顯示熱鍵前綴。
itemTextFormat.HotkeyPrefix = HotkeyPrefix.Show;
SolidBrush textBrush = new SolidBrush(SystemColors.MenuText);
g.DrawString(item.ItemText, SystemInformation.MenuFont, textBrush, itemTextArea, itemTextFormat);
//Checkbox處理
if (item.IsChecked)
{
int checkBoxGap = (int)((drawRect.Height - BasicSide) / 2);
int checkBoxLeft = drawRect.Left + checkBoxGap;
int checkBoxTop = drawRect.Top + checkBoxGap;
//將checkBoxArea的Top減1,與文本的對齊效果稍微好一些。
Rectangle checkBoxArea = new Rectangle(checkBoxLeft, checkBoxTop - 1, BasicSide, BasicSide);
using (Brush checkBoxBrush = new SolidBrush(Color.FromArgb(214, 235, 255)))
g.FillRectangle(checkBoxBrush, checkBoxArea);
using (Pen checkBoxPen = new Pen(Color.FromArgb(51, 153, 255)))
g.DrawRectangle(checkBoxPen, checkBoxArea);
using (Pen checkBoxTick = new Pen(Color.FromArgb(51, 153, 255)))
{
g.DrawLine(checkBoxTick, new Point(checkBoxLeft, checkBoxTop - 1 + (int)(BasicSide / 2)), new Point(checkBoxLeft + (int)(BasicSide / 2), checkBoxTop - 1 + BasicSide));
g.DrawLine(checkBoxTick, new Point(checkBoxLeft + (int)(BasicSide / 2), checkBoxTop - 1 + BasicSide), new Point(checkBoxLeft + BasicSide + BasicGap, checkBoxTop - 1 - BasicGap));
}
}
}
///
/// 點擊測試
///
/// X坐標(biāo)
/// Y坐標(biāo)
///
private PopupMenuItem HitTest(int X, int Y)
{
if (X < 0 || X > Width || Y < 0 || Y > Height)
{
return null;
}
int left = BasicGap, top = BasicGap;
int rows = 0, cols = 1;
foreach (PopupMenuItem item in items)
{
if (totality == 1)
{
rows++;
if (X > left && X < left + eachWidth[0] && Y > top + (rows - 1) * BasicConst && Y < top + rows * BasicConst)
{
return item;
}
}
else
{
rows++;
if (X > left && X < left + eachWidth[cols - 1] && Y > top + (rows - 1) * BasicConst && Y < top + rows * BasicConst)
{
return item;
}
//1..[totality-1]列
if (rows % BasicRows == 0)
{
left += eachWidth[cols - 1];
top = BasicGap;
cols++;
rows = 0;
}
}
}
return null;
}
///
/// 是否是鼠標(biāo)移過
///
/// X坐標(biāo)
/// Y坐標(biāo)
///
public bool IsMouseMove(int X, int Y)
{
PopupMenuItem popupMenuItem = HitTest(X, Y);
if (popupMenuItem != hotItem)
{
hotItem = popupMenuItem;
return true;
}
else
{
return false;
}
}
///
/// 是否是鼠標(biāo)按下
///
/// X坐標(biāo)
/// Y坐標(biāo)
///
public bool IsMouseDown(int X, int Y)
{
PopupMenuItem popupMenuItem = HitTest(X, Y);
return popupMenuItem != null;
}
} 這個類實現(xiàn)了多菜單頁面的功能:即如果DataGridView字段非常的多,可通過產(chǎn)生多列菜單來顯示,程序是通過BasicRows變量來控制。
5、新建一個DataGridViewColumnSelector類,此類的功能主要是銜接DataGridView與PopupMenuControl,其代碼如下:
////// DataGridView右鍵菜單自定義顯示及隱藏列 /// class DataGridViewColumnSelector { private DataGridView dgvTarget = null; //待處理的DataGridView對象 private ToolStripDropDown dropDown; //用于加載PopupMenu控件 PopupMenuControl popupMenuControl = new PopupMenuControl(); //PopupMenu控件 //無參構(gòu)造函數(shù) public DataGridViewColumnSelector() { //注冊PopupMenu控件事件 popupMenuControl.CheckedChangedEvent += new PopupMenuControl.CheckedChanged(OnCheckedChanged); //使用容器承載PopupMenu控件(相當(dāng)于容器類型的ToolStripItem) ToolStripControlHost controlHost = new ToolStripControlHost(popupMenuControl); controlHost.Padding = Padding.Empty; controlHost.Margin = Padding.Empty; controlHost.AutoSize = false; //加載PopupMenu控件 dropDown = new ToolStripDropDown(); dropDown.Padding = Padding.Empty; dropDown.AutoClose = true; dropDown.Items.Add(controlHost); } //有參構(gòu)造函數(shù) public DataGridViewColumnSelector(DataGridView dataGridView) : this() { DataGridView = dataGridView; } //DataGridView屬性 public DataGridView DataGridView { get { return dgvTarget; } set { //去除單元格點擊事件 if (dgvTarget != null) { dgvTarget.CellMouseClick -= new DataGridViewCellMouseEventHandler(DataGridView_CellMouseClick); } dgvTarget = value; //注冊單元格點擊事件 if (dgvTarget != null) { dgvTarget.CellMouseClick += new DataGridViewCellMouseEventHandler(DataGridView_CellMouseClick); } } } ////// 右鍵點擊標(biāo)題欄彈出菜單 /// /// /// private void DataGridView_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e) { if (e.Button == MouseButtons.Right && e.RowIndex == -1) { popupMenuControl.Initialize(dgvTarget); //將菜單顯示在光標(biāo)位置 dropDown.Show(Cursor.Position); } } ////// 勾選事件執(zhí)行方法 /// /// /// private void OnCheckedChanged(int hitIndex, bool isChecked) { dgvTarget.Columns[hitIndex].Visible = isChecked; } }
6、以上這些,已經(jīng)實現(xiàn)了全部的功能。下面開始建一個WinForm程序來測試結(jié)果,為方便測試將DataGridView的數(shù)據(jù)源由xml文件讀取。
從SQL Server數(shù)據(jù)庫隨便找張數(shù)據(jù)表生成XML,文件保存為Test.xml。(請將Test.xml文件拷貝到Debug文件夾下面)
SELECT TOP 10 MO_NO,MRP_NO,QTY,BIL_NO
FROM MF_MO
WHERE MO_DD='2019-11-07'
ORDER BY MO_NO
FOR XML PATH ('Category'),TYPE,ROOT('DocumentElement')7、新建一個WinForm程序,命名為Main,并拖入一個DataGridView控件,Main_Load方法如下:
private void Main_Load(object sender, EventArgs e)
{
try
{
//xml文件路徑
string path = @"Test.xml";
//讀取文件
DataSet ds = new DataSet();
if (File.Exists(path))
{
ds.ReadXml(path);
}
dataGridView1.DataSource = ds.Tables.Count > 0 ? ds.Tables[0] : null;
//加工dataGridView1
#region 加列標(biāo)題測試
dataGridView1.Columns[0].HeaderText = "制令單號";
dataGridView1.Columns[1].HeaderText = "成品編號";
dataGridView1.Columns[2].HeaderText = "生產(chǎn)數(shù)量";
dataGridView1.Columns[3].HeaderText = "來源單號";
#endregion
DataGridViewColumnSelector columnSelector = new DataGridViewColumnSelector(dataGridView1);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}8、執(zhí)行程序,在任意DataGridView標(biāo)題欄右擊,即可彈出菜單:
關(guān)于怎么在DataGridView中實現(xiàn)右鍵菜單自定義顯示及隱藏列功能問題的解答就分享到這里了,希望以上內(nèi)容可以對大家有一定的幫助,如果你還有很多疑惑沒有解開,可以關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道了解更多相關(guān)知識。