C#高级：DataGridView的详解

一、每条数据增加一个按钮，点击输出对应实体

请先确保正确添加实体的名称和文本：

private void button6_Click(object sender, EventArgs e)
{//SQL查询到数据，存于list中List<InforMessage> list = bll.QueryInforMessage();//含有字段：Title PublishTime UserName Content// 清空现有数据dataGridView1.Rows.Clear();//添加数据foreach (var item in list){//绑定数据，注意你的不一定是dataGridView1int rowIndex = dataGridView1.Rows.Add();dataGridView1.Rows[rowIndex].Cells["Title"].Value = item.Title;dataGridView1.Rows[rowIndex].Cells["PublishTime"].Value = item.PublishTime;dataGridView1.Rows[rowIndex].Cells["UserName"].Value = item.UserName;dataGridView1.Rows[rowIndex].Cells["Content"].Value = "点击查看";//按钮名称// 将数据实体关联到行的 Tag 属性上以便后续处理dataGridView1.Rows[rowIndex].Tag = item;}
}// 在 DataGridView 的 CellContentClick （点击某一单元格）事件中处理内容按钮点击事件
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{if (e.ColumnIndex == dataGridView1.Columns["Content"].Index && e.RowIndex >= 0)//若点击了标签为【Content】列的按钮{// 获取当前行对应的实体对象【注意修改此处InforMessage类】var item = dataGridView1.Rows[e.RowIndex].Tag as InforMessage;//将list实体中的content展示出来if (item != null){MessageBox.Show(item.Content, "内容详情");}}
}

二、输出选中的实体信息

【代码如下】

 private void Form1_Load(object sender, EventArgs e){//sql查表List<Student> list = bll.QueryStudent();// 清空现有数据dataGridView1.Rows.Clear();//添加数据foreach (var item in list){int rowIndex = dataGridView1.Rows.Add();dataGridView1.Rows[rowIndex].Cells["ID"].Value = item.ID;dataGridView1.Rows[rowIndex].Cells["Name"].Value = item.Name;dataGridView1.Rows[rowIndex].Tag = item;}}private void button1_Click(object sender, EventArgs e)//点击触发{//获取选中的实体（在窗体上定义好了）var result = selectedStudent;}private void dataGridView1_SelectionChanged(object sender, EventArgs e)//选中触发{if (dataGridView1.SelectedRows.Count > 0){DataGridViewRow selectedRow = dataGridView1.SelectedRows[0];selectedStudent = (Student)selectedRow.Tag;//获取选中的实体}else{selectedStudent = null;}}