如何根据dropdownlist的选择动态设置gridview中单元格的值？

<select id="dropdownlist" onchange="updateGridView()">
  <option value="value1">Value 1</option>
  <option value="value2">Value 2</option>
  <option value="value3">Value 3</option>
</select>

<table id="gridview">
  <tr>
    <th>Column 1</th>
    <th>Column 2</th>
  </tr>
  <tr>
    <td id="cell1"></td>
    <td id="cell2"></td>
  </tr>
</table>

<script>
function updateGridView() {
  var dropdownlist = document.getElementById("dropdownlist");
  var selectedValue = dropdownlist.value;

  var cell1 = document.getElementById("cell1");
  var cell2 = document.getElementById("cell2");

  if (selectedValue === "value1") {
    cell1.innerHTML = "Value 1";
    cell2.innerHTML = "Some data for Value 1";
  } else if (selectedValue === "value2") {
    cell1.innerHTML = "Value 2";
    cell2.innerHTML = "Some data for Value 2";
  } else if (selectedValue === "value3") {
    cell1.innerHTML = "Value 3";
    cell2.innerHTML = "Some data for Value 3";
  }
}
</script>

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        // 初始化gridview的数据
        DataTable dt = new DataTable();
        dt.Columns.Add("Column1");
        dt.Columns.Add("Column2");

        DataRow row = dt.NewRow();
        row["Column1"] = "";
        row["Column2"] = "";
        dt.Rows.Add(row);

        gridview.DataSource = dt;
        gridview.DataBind();
    }
}

protected void gridview_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        DropDownList dropdownlist = (DropDownList)e.Row.FindControl("dropdownlist");
        Label label = (Label)e.Row.FindControl("label");

        if (dropdownlist != null && label != null)
        {
            string selectedValue = dropdownlist.SelectedValue;

            if (selectedValue == "value1")
            {
                label.Text = "Some data for Value 1";
            }
            else if (selectedValue == "value2")
            {
                label.Text = "Some data for Value 2";
            }
            else if (selectedValue == "value3")
            {
                label.Text = "Some data for Value 3";
            }
        }
    }
}