定义两个样式对象：
//定义两种行样式 private DataGridViewCellStyle m_RowStyleNormal; private DataGridViewCellStyle m_RowStyleAlternate;
在窗体加载的时候对样式进行设置：
/// <summary> /// 设置行样式 /// </summary> private void SetRowStyle() { //可根据需要设置更多样式属性，如字体、对齐、前景色、背景色等 this.m_RowStyleNormal = new DataGridViewCellStyle(); this.m_RowStyleNormal.BackColor = Color.LightBlue; this.m_RowStyleNormal.SelectionBackColor = Color.LightSteelBlue; this.m_RowStyleAlternate = new DataGridViewCellStyle(); this.m_RowStyleAlternate.BackColor = Color.LightGray; this.m_RowStyleAlternate.SelectionBackColor = Color.LightSlateGray; }
定义演示数据：
/// <summary> /// 绑定数据 /// </summary> private void BindData() { //建立一个DataTable并填充数据，然后绑定到DataGridView控件上 m_GradeTable = new DataTable(); m_GradeTable.Columns.Add("Class", typeof(string)); m_GradeTable.Columns.Add("Name", typeof(string)); m_GradeTable.Columns.Add("Grade", typeof(int)); m_GradeTable.Rows.Add(new string[] { "Class1", "Jim", "89" }); m_GradeTable.Rows.Add(new string[] { "Class1", "Jack", "77" }); m_GradeTable.Rows.Add(new string[] { "Class1", "Bill", "91" }); m_GradeTable.Rows.Add(new string[] { "Class2", "Tom", "58" }); m_GradeTable.Rows.Add(new string[] { "Class2", "Rose", "95" }); m_GradeTable.Rows.Add(new string[] { "Class3", "Peter", "64" }); m_GradeTable.Rows.Add(new string[] { "Class3", "David", "82" }); m_GradeTable.Rows.Add(new string[] { "Class3", "Eric", "68" }); m_GradeTable.Rows.Add(new string[] { "Class3", "Lily", "79" }); this.bdsGrade.DataSource = m_GradeTable; }
在DataGridView控件的CellFormatting事件中实现设置行样式、单元格样式和行号：
private void dgvDataTable_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e) { //在此对行样式进行设置 if (e.ColumnIndex == this.dgvGrade.Columns["ColumnClass"].Index)//根据班级设置行样式 { DataGridViewRow CurrentRow = this.dgvGrade.Rows[e.RowIndex]; CurrentRow.HeaderCell.Value = Convert.ToString(e.RowIndex + 1);//显示行号，也可以设置成显示其他信息 //CurrentRow.HeaderCell.ToolTipText = "当前第" + Convert.ToString(e.RowIndex + 1) + "行";//设置ToolTip信息 //以下为根据上一行内容判断所属组的效果 if (e.RowIndex == 0)//首行必须特殊处理，将其设置为常规样式 { CurrentRow.DefaultCellStyle = this.m_RowStyleNormal; } else { //判断和上一行是否属于同一个班级，如果是则设置相同样式，否则设置另一种样式 //需要定义两个DataGridViewCellStyle，用于交替显示，也可以根据需要隐藏一些和上一行重复的信息 //这里当两行是同一个班级时，将下一行的班级信息隐藏掉，选中时则显示班级信息 if (CurrentRow.Cells[e.ColumnIndex].Value != DBNull.Value && CurrentRow.Cells[e.ColumnIndex].Value != null && CurrentRow.Cells[e.ColumnIndex].Value.ToString() == this.dgvGrade.Rows[e.RowIndex - 1].Cells[e.ColumnIndex].Value.ToString()) { CurrentRow.DefaultCellStyle = this.dgvGrade.Rows[e.RowIndex - 1].DefaultCellStyle;//设置和上一行的样式相同 CurrentRow.Cells[e.ColumnIndex].Style.ForeColor = CurrentRow.DefaultCellStyle.BackColor;//用前景色隐藏信息 //如果需要选中时显示完整信息则注释该下面一行 //CurrentRow.Cells[e.ColumnIndex].Style.SelectionForeColor = CurrentRow.DefaultCellStyle.SelectionBackColor;//选中时也使前景色等于背景色，将文字隐藏掉 } else//当前行和上一行不属于同一个班级时 { if (this.dgvGrade.Rows[e.RowIndex - 1].DefaultCellStyle == this.m_RowStyleNormal)//根据上一行的样式设置当前行的样式 CurrentRow.DefaultCellStyle = this.m_RowStyleAlternate; else CurrentRow.DefaultCellStyle = this.m_RowStyleNormal; } }//if(e.RowIndex == 0) } else if (e.ColumnIndex == this.dgvGrade.Columns["ColumnGrade"].Index)//根据成绩设置单元格样式 { if (this.dgvGrade.Rows[e.RowIndex].Cells[e.ColumnIndex].Value != DBNull.Value && Convert.ToInt32(this.dgvGrade.Rows[e.RowIndex].Cells[e.ColumnIndex].Value) < 60)//对不及格的成绩设置特殊样式 { this.dgvGrade.Rows[e.RowIndex].Cells[e.ColumnIndex].Style.ForeColor = Color.Red;//设置小于60的数字显示为红色 this.dgvGrade.Rows[e.RowIndex].Cells[e.ColumnIndex].Style.SelectionForeColor = Color.Red; this.dgvGrade.Rows[e.RowIndex].Cells[e.ColumnIndex].Style.Alignment = DataGridViewContentAlignment.MiddleRight; } } }
在DataGridView控件的RowPostPaint事件中实现行标题图标绘制和提示信息设置：
//根据内容设置行标头 private void dgvDataTable_RowPostPaint(object sender, DataGridViewRowPostPaintEventArgs e) { if (this.dgvGrade.Rows[e.RowIndex].Cells["ColumnGrade"].Value == DBNull.Value) return; int intGrade = Convert.ToInt32(this.dgvGrade.Rows[e.RowIndex].Cells["ColumnGrade"].Value);//获取成绩 Image RowIcon;//标头图标 string strToolTip;//提示信息 if (intGrade >= 90) { RowIcon = TestDataGridViewRowStyle.Properties.Resources.GradeA;//从资源文件中获取图片 strToolTip = "Grade A"; } else if (intGrade >= 80) { RowIcon = TestDataGridViewRowStyle.Properties.Resources.GradeB; strToolTip = "Grade B"; } else if (intGrade >= 70) { RowIcon = TestDataGridViewRowStyle.Properties.Resources.GradeC; strToolTip = "Grade C"; } else if (intGrade >= 60) { RowIcon = TestDataGridViewRowStyle.Properties.Resources.GradeD; strToolTip = "Grade D"; } else { RowIcon = TestDataGridViewRowStyle.Properties.Resources.GradeF; strToolTip = "Grade F"; } e.Graphics.DrawImage(RowIcon, e.RowBounds.Left + this.dgvGrade.RowHeadersWidth - 20, e.RowBounds.Top + 4, 16, 16);//绘制图标 this.dgvGrade.Rows[e.RowIndex].HeaderCell.ToolTipText = strToolTip;//设置提示信息 }