类准备不复述了,点这里。
说下思路:DataGridView单元格显示内容是通过对象的ToString()方法获取的,所以重写要换行的列的ToString()方法即可。实现换行需要设置DataGridView的两个属性:1、在属性窗口找到AutoSizeRowsMode,设置为AllCells(此设置表示让行间距适应单元格内容高度);2、在属性窗口找到DefaultCellStyle,打开属性编辑窗口,设置WrapMode为true(此设置表示单元格内容长度超出则换行显示)。下面给出增加的代码。
新增类Col_3,如下:
1 class Col_3 2 { 3 int _dto, _dfo; 4 5 public Col_3(int dto, int dfo) 6 { 7 _dto = dto; 8 _dfo = dfo; 9 } 10 11 public override string ToString() 12 { 13 return string.Format("DTO:{0}{1}DFO:{2}", _dto, Environment.NewLine, _dfo); 14 } 15 }
在Character类中增加Col_3属性,如下:
1 class Character : INotifyPropertyChanged 2 { 3 string _name; 4 [DisplayName("你的名字")] // 这是显示的列名称哦 5 public string Name 6 { 7 get { return _name; } 8 set 9 { 10 if (_name != value) 11 { 12 _name = value; 13 NotifyPropertyChanged("Name"); 14 } 15 } 16 } 17 18 // 2) 在属性改变时引发事件 19 int _age; 20 [DisplayName("他的年纪")] 21 public int Age 22 { 23 get { return _age; } 24 set 25 { 26 if (_age != value) 27 { 28 _age = value; 29 NotifyPropertyChanged("Age"); 30 } 31 } 32 } 33 34 Col_3 _customCol; 35 public Col_3 CustomCol 36 { 37 get { return _customCol; } 38 set 39 { 40 if (_customCol != value) 41 { 42 _customCol = value; 43 NotifyPropertyChanged("CustomCol"); 44 } 45 } 46 } 47 48 PropertyChangedEventHandler _propertyChanged; 49 public event PropertyChangedEventHandler PropertyChanged 50 { 51 add { _propertyChanged += value; } 52 remove { _propertyChanged -= value; } 53 } 54 55 private void NotifyPropertyChanged(string property_name) 56 { 57 _propertyChanged?.Invoke(this, new PropertyChangedEventArgs(property_name)); 58 } 59 } /* end of class Character */
添加CellFormatting事件处理,根据内容设置背景,如下:
1 private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e) 2 { 3 if (e.RowIndex < 0 || e.ColumnIndex < 0) 4 return; 5 6 if (e.Value is Col_3) // if( (e.Value as Col_3)?.DTO > 0 ) ... 7 e.CellStyle.BackColor = Color.Green; 8 else if (e.Value is string) 9 e.CellStyle.BackColor = Color.Salmon; 10 else if (e.Value is int) 11 e.CellStyle.BackColor = Color.Blue; 12 }
在Init()方法中添加数据测试,如下:
1 void Init() 2 { 3 _dtSource = new DataTable(); 4 _bdList = new BindingList<Character>(); 5 _bdSource = new BindingSource(); 6 _bdSource.DataSource = _bdList; // 3) 绑定数据源,由BindingSoource组件处理细节 7 8 _dtSource.Columns.Add(new DataColumn("Name")); 9 _dtSource.Columns.Add(new DataColumn("Age")); 10 11 DataRow dr; 12 13 dr = _dtSource.NewRow(); 14 dr["Name"] = "1"; 15 dr["Age"] = "21"; 16 _dtSource.Rows.Add(dr); 17 18 dr = _dtSource.NewRow(); 19 dr[0] = "2"; 20 dr[1] = "23"; 21 _dtSource.Rows.Add(dr); 22 23 _dtSource.Rows.Add(3, 27); 24 25 _bdList.Add(new Character() { Name = "1", Age = 21, CustomCol = new Col_3(0, 0) }); 26 _bdList.Add(new Character() { Name = "2", Age = 23, CustomCol = new Col_3(1, 1) }); 27 _bdList.Add(new Character() { Name = "3", Age = 27, CustomCol = new Col_3(2, 2) }); 28 }
效果: