using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace DatagridviewTest
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
this.dataGridView1.SelectionMode = System.Windows.Forms.DataGridViewSelectionMode.CellSelect;
BindCombox();
BindDatasources();
}
int vscroll = 0, hscroll = 0;
#region datagridview 绑定数据自动刷新、添加、删除等
/// <summary>
/// datagridview 数据源
/// 必须使用BindingList， 如果使用LIST，无法实现更改，添加、删除数据源自动更新datagridview
/// </summary>
BindingList<Studect> studentLst = new BindingList<Studect>();
void BindDatasources()
{
studentLst.Add(new Studect() { Name = "A", Age = 10, UpdateTime = DateTime.Now.ToString(), Sex = 1 });
studentLst.Add(new Studect() { Name = "B", Age = 10, UpdateTime = DateTime.Now.ToString(), Sex = 1 });
studentLst.Add(new Studect() { Name = "C", Age = 10, UpdateTime = DateTime.Now.ToString(), Sex = 1 });
studentLst.Add(new Studect() { Name = "D", Age = 10, UpdateTime = DateTime.Now.ToString(), Sex = 1 });
studentLst.Add(new Studect() { Name = "E", Age = 10, UpdateTime = DateTime.Now.ToString(), Sex = 0 });
this.dataGridView1.DataSource = studentLst;
dataGridView1.FirstDisplayedScrollingRowIndex = vscroll;
dataGridView1.HorizontalScrollingOffset = hscroll;
}
private void button1_Click(object sender, EventArgs e)
{
studentLst.Add(new Studect() { Name = DateTime.Now.ToString(), Age = 10, UpdateTime = DateTime.Now.ToString() });
}
private void button2_Click(object sender, EventArgs e)
{
if (dataGridView1.SelectedRows != null)
{
Studect s = dataGridView1.CurrentRow.DataBoundItem as Studect;
if (s != null)
studentLst.Remove(s);
}
}
#endregion
#region datagridview 添加combox下拉框
ComboBox sexCmb = new ComboBox();
private void BindCombox()
{
List<ContainerType<int>> SexLst = new List<ContainerType<int>>()
{
new ContainerType<int>(){ Value = 0,Describle="男"},
new ContainerType<int>(){ Value = 1,Describle="女"},
};
#region 方法一
//sexCmb.DisplayMember = "Describle";
//sexCmb.ValueMember = "Value";
//sexCmb.DataSource = SexLst;
//sexCmb.DropDownStyle = ComboBoxStyle.DropDownList;
//sexCmb.DrawMode = DrawMode.OwnerDrawFixed;
//sexCmb.DrawItem += SexCmb_DrawItem;
//// 设置下拉列表框不可见
//sexCmb.Visible = false;
//// 添加下拉列表框事件
//sexCmb.SelectedIndexChanged += new EventHandler(cmb_Temp_SelectedIndexChanged);
//dataGridView1.Scroll += dataGridView1_Scroll;
//dataGridView1.ColumnWidthChanged += dataGridView1_ColumnWidthChanged;
//dataGridView1.CurrentCellChanged += dataGridView1_CurrentCellChanged;
////dataGridView1.DataBindingComplete += DataGridView1_DataBindingComplete;
//// 将下拉列表框加入到DataGridView控件中
//this.dataGridView1.Controls.Add(sexCmb);
#endregion
#region 方法二
DataGridViewTextBoxColumn c1 = new DataGridViewTextBoxColumn();
c1.DataPropertyName = "Name";
c1.HeaderText = "名字";
dataGridView1.Columns.Add(c1);
DataGridViewComboBoxColumn dgvCmb = new DataGridViewComboBoxColumn();
dgvCmb.DisplayMember = "Describle";
dgvCmb.ValueMember = "Value";
dgvCmb.DataSource = SexLst;
dgvCmb.DataPropertyName = "Sex";
dgvCmb.HeaderText = "性别";
//dgvCmb.FlatStyle = FlatStyle.Flat;
dgvCmb.DisplayStyle = DataGridViewComboBoxDisplayStyle.Nothing;
//dgvCmb.
dataGridView1.Columns.Add(dgvCmb);
//dataGridView1.CellEnter += DataGridView1_CellEnter;
dataGridView1.EditingControlShowing += DataGridView1_EditingControlShowing;
dataGridView1.CellEndEdit += DataGridView1_CellEndEdit;
//dataGridView1.e
#endregion
}
private void DataGridView1_CellEnter(object sender, DataGridViewCellEventArgs e)
{
//实现单击一次显示下拉列表框
if (dataGridView1.Columns[e.ColumnIndex] is DataGridViewComboBoxColumn && e.RowIndex != -1)
{
SendKeys.SendWait("{F4}");
}
}
private void DataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
if (sexCmb != null)
{
sexCmb.DrawItem -= Cmb_DrawItem;
//sexCmb.Dispose();
sexCmb = null;
}
}
private void DataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
if (e.Control.GetType() == typeof(DataGridViewComboBoxEditingControl))
{
sexCmb = e.Control as ComboBox;
sexCmb.DrawMode = DrawMode.OwnerDrawFixed;
sexCmb.DrawItem += Cmb_DrawItem;
}
}
private void Cmb_DrawItem(object sender, DrawItemEventArgs e)
{
ComboBox combox = sender as ComboBox;
Pen fColor = new Pen(Color.Black);
Pen bColor = new Pen(Color.White);
var a = combox.Items[e.Index] as ContainerType<int>;
if (a.Value == 0)
{
fColor = new Pen(Color.Green);
}
else
{
fColor = new Pen(Color.Red);
}
if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
{
bColor = new Pen(Color.Blue);
fColor = new Pen(Color.White);
}
e.Graphics.FillRectangle(bColor.Brush, e.Bounds);
e.Graphics.DrawString(a.Describle, this.Font, fColor.Brush, e.Bounds);
//combox.DrawItem -= Cmb_DrawItem;
}
private void Combox_SelectedIndexChanged(object sender, EventArgs e)
{
ComboBox combox = sender as ComboBox;
combox.SelectedIndexChanged -= Combox_SelectedIndexChanged;
}
private void SexCmb_DrawItem(object sender, DrawItemEventArgs e)
{
//初始化字体和背景色
Pen fColor = new Pen(Color.Black);
Pen bColor = new Pen(Color.White);
//if (e.Index < 0) return;
var a = sexCmb.Items[e.Index] as ContainerType<int>;
if (a.Value == 0)
{
fColor = new Pen(Color.Green);
}
else
{
fColor = new Pen(Color.Red);
}
e.Graphics.FillRectangle(bColor.Brush, e.Bounds);
e.Graphics.DrawString(a.Describle, this.Font, fColor.Brush, e.Bounds);
}
private void DataGridView1_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
{
for (int i = 0; i < this.dataGridView1.Rows.Count; i++)
{
//for (int c = 0; c < dataGridView1.Columns.Count; c++)
//{
//}
if (dataGridView1.Rows[i].Cells[2].Value != null)
{
if (dataGridView1.Rows[i].Cells[2].Value.ToString().Trim() == "1")
{
dataGridView1.Rows[i].Cells[2].Value = "女";
}
else if(dataGridView1.Rows[i].Cells[2].Value.ToString().Trim() == "0")
{
dataGridView1.Rows[i].Cells[2].Value = "男";
}
}
}
}
// 当用户移动到性别这一列时单元格显示下拉列表框
private void dataGridView1_CurrentCellChanged(object sender, EventArgs e)
{
DataGridViewCell CurrnetCell = dataGridView1.CurrentCell;
if (CurrnetCell != null && CurrnetCell.OwningColumn.HeaderText == "性别")
{
Rectangle TmpRect = dataGridView1.GetCellDisplayRectangle(CurrnetCell.ColumnIndex, CurrnetCell.RowIndex, false);
sexCmb.SelectedValue = CurrnetCell.Value;
//sexCmb.Text = CurrnetCell.Value.ToString();
sexCmb.Size = TmpRect.Size;
sexCmb.Top = TmpRect.Top;
sexCmb.Left = TmpRect.Left;
sexCmb.Visible = true;
}
else
{
sexCmb.Visible = false;
}
}
// 滚动DataGridView时将下拉列表框设为不可见
private void dataGridView1_Scroll(object sender, ScrollEventArgs e)
{
if (e.ScrollOrientation == ScrollOrientation.HorizontalScroll)
{
hscroll = e.NewValue;
}
else if (e.ScrollOrientation == ScrollOrientation.VerticalScroll)
{
vscroll = e.NewValue;
}
this.sexCmb.Visible = false;
}
// 改变DataGridView列宽时将下拉列表框设为不可见
private void dataGridView1_ColumnWidthChanged(object sender, DataGridViewColumnEventArgs e)
{
this.sexCmb.Visible = false;
}
private void button3_Click(object sender, EventArgs e)
{
if (dataGridView1.SelectedRows != null)
{
Studect s = dataGridView1.CurrentRow.DataBoundItem as Studect;
if (s != null)
{
s.Name = DateTime.Now.ToString();//修改名称，界面自动更新
}
}
}
// 当用户选择下拉列表框时改变DataGridView单元格的内容
private void cmb_Temp_SelectedIndexChanged(object sender, EventArgs e)
{
dataGridView1.CurrentCell.Value = ((ComboBox)sender).SelectedValue;
}
//sexComb
#endregion
}
/// <summary>
///
/// </summary>
public class Studect : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged(String info)
{
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(info));
}
string _name;
[DisplayName("你的名字")] // 这是显示的列名称哦
public string Name
{
get { return _name; }
set
{
if (_name != value)
{
_name = value;
NotifyPropertyChanged("Name");
}
}
}
// 2) 在属性改变时引发事件
int _age;
[DisplayName("他的年纪")]
public int Age
{
get { return _age; }
set
{
if (_age != value)
{
_age = value;
}
}
}
int _sex;
[DisplayName("性别")]
public int Sex
{
get { return _sex; }
set { _sex = value; }
}
//List<ContainerType<int>> _sexlst;
//[DisplayName("性别")]
//public List<ContainerType<int>> SexLst
//{
// get { return _sexlst; }
// set { _sexlst = value; }
//}
string _updateTime;
[DisplayName("更新时间")]
public string UpdateTime
{
get { return _updateTime; }
set
{
if (_updateTime != value)
{
_updateTime = value;
}
}
}
}
public class ContainerType<T>
{
public T Value { get; set; }
public string Describle { get; set; }
}
}