如何通过文本框更改DynamicGridView中选定单元格的值？

// 在DynamicGridView的OnRowEditing事件中
protected void DynamicGridView_RowEditing(object sender, GridViewEditEventArgs e)
{
    DynamicGridView.EditIndex = e.NewEditIndex;
    DynamicGridView.DataBind();

    // 获取选定单元格的文本框控件，并设置可见性为true
    TextBox textBox = (TextBox)DynamicGridView.Rows[e.NewEditIndex].Cells[0].FindControl("TextBox1");
    textBox.Visible = true;
}

// 在DynamicGridView的OnRowUpdating事件中
protected void DynamicGridView_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
    // 获取选定单元格的新值
    TextBox textBox = (TextBox)DynamicGridView.Rows[e.RowIndex].Cells[0].FindControl("TextBox1");
    string newValue = textBox.Text;

    // 更新数据源中对应的数据
    // ...

    DynamicGridView.EditIndex = -1;
    DynamicGridView.DataBind();

    // 将选定单元格的文本框控件可见性设置为false
    textBox.Visible = false;
}

// 在DynamicGridView的OnRowCancelingEdit事件中
protected void DynamicGridView_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
{
    DynamicGridView.EditIndex = -1;
    DynamicGridView.DataBind();

    // 获取选定单元格的文本框控件，并设置可见性为false
    TextBox textBox = (TextBox)DynamicGridView.Rows[e.RowIndex].Cells[0].FindControl("TextBox1");
    textBox.Visible = false;
}