使用ASP.NET在加载时更改GridView中的值

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        // 创建一个数据表
        DataTable dt = new DataTable();
        dt.Columns.Add("ID");
        dt.Columns.Add("Name");
        dt.Columns.Add("Age");

        // 添加一些数据
        dt.Rows.Add(1, "John", 25);
        dt.Rows.Add(2, "Mary", 30);
        dt.Rows.Add(3, "Bob", 40);

        // 将数据表绑定到GridView
        GridView1.DataSource = dt;
        GridView1.DataBind();

        // 修改GridView中的值
        foreach (GridViewRow row in GridView1.Rows)
        {
            // 获取行的数据键值
            int id = Convert.ToInt32(GridView1.DataKeys[row.RowIndex].Value);

            // 根据数据键值修改行的值
            if (id == 1)
            {
                row.Cells[1].Text = "Jane";
                row.Cells[2].Text = "28";
            }
            else if (id == 2)
            {
                row.Cells[1].Text = "Mike";
                row.Cells[2].Text = "32";
            }
            else if (id == 3)
            {
                row.Cells[1].Text = "Alice";
                row.Cells[2].Text = "42";
            }
        }
    }
}