DataGridView 中当前选定行的索引

DataGridView中当前选定行的索引及案例代码

csharp
int selectedIndex = -1;
if (dataGridView1.SelectedRows.Count > 0)
{
    selectedIndex = dataGridView1.SelectedRows[0].Index;
}

csharp
private void Form1_Load(object sender, EventArgs e)
{
    // 创建DataGridView并添加列
    DataGridView dataGridView1 = new DataGridView();
    dataGridView1.Columns.Add("Name", "姓名");
    dataGridView1.Columns.Add("Age", "年龄");
    dataGridView1.Columns.Add("Gender", "性别");
    // 添加数据
    dataGridView1.Rows.Add("张三", 18, "男");
    dataGridView1.Rows.Add("李四", 20, "女");
    dataGridView1.Rows.Add("王五", 22, "男");
    // 添加SelectionChanged事件处理程序
    dataGridView1.SelectionChanged += DataGridView1_SelectionChanged;
    // 将DataGridView添加到窗体中
    this.Controls.Add(dataGridView1);
}
private void DataGridView1_SelectionChanged(object sender, EventArgs e)
{
    int selectedIndex = -1;
    if (dataGridView1.SelectedRows.Count > 0)
    {
        selectedIndex = dataGridView1.SelectedRows[0].Index;
    }
    // 根据索引获取学生信息，并在界面上显示
    if (selectedIndex >= 0)
    {
        string name = dataGridView1.Rows[selectedIndex].Cells["Name"].Value.ToString();
        int age = Convert.ToInt32(dataGridView1.Rows[selectedIndex].Cells["Age"].Value);
        string gender = dataGridView1.Rows[selectedIndex].Cells["Gender"].Value.ToString();
        MessageBox.Show($"姓名：{name}\n年龄：{age}\n性别：{gender}");
    }
}