C# 如何将文本框中的数据放入网格的空行中

我想在asp.net的gridview中显示16个空行。我在网格外有一个按钮和文本框，单击一个按钮，我必须将文本框中的数据插入网格，但问题是，数据插入到16行之后。如何首先在空行中插入数据。？ 我将数据源绑定为null，但网格不可见，因此我在pageload事件中创建了行

protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
               DataTable dtSource = new DataTable();
                    dtSource.Columns.Add("DateTime");
                    dtSource.Columns.Add("Detail");
                    dtSource.Columns.Add("Status");
                    dtSource.Columns.Add("Cancel");
                   for (int i = 0; i <= 15; i++)
                     {
                       dtSource.Rows.Add("", " ", " ", " ");
                     }
                    ViewState["dtSource"] = dtSource;
                    gridItem.DataSource = dtSource;
                    gridItem.DataBind();

            }
        }

---

这是因为您正在创建一个新行并添加它，如下所示

DataRow dr = dtSource.NewRow();

添加这16行没有意义。你应该做像这样的事情

protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
               DataTable dtSource = new DataTable();
                    dtSource.Columns.Add("DateTime");
                    dtSource.Columns.Add("Detail");
                    dtSource.Columns.Add("Status");
                    dtSource.Columns.Add("Cancel");
                    ViewState["dtSource"] = dtSource;
                    gridItem.DataSource = dtSource;
                    gridItem.DataBind();

            }
        }


protected void btnAdd(object sender, EventArgs e)
        {
            DataTable dtSource = ViewState["dtSource"] as DataTable;          
            DataRow dr = dtSource.NewRow();
            dtSource.Rows.Add(DateTime.Now, itemDetail, "", "");
            gridItem.DataSource = dtSource;
            gridItem.DataBind();
            ViewState["dtSource"] = dtSource;
        }

---

但需要显示空行。请你给我一些其他的想法来展示这一空排好吗。如果我使用你的pageload代码，那么我的网格是隐藏的。

protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
               DataTable dtSource = new DataTable();
                    dtSource.Columns.Add("DateTime");
                    dtSource.Columns.Add("Detail");
                    dtSource.Columns.Add("Status");
                    dtSource.Columns.Add("Cancel");
                    ViewState["dtSource"] = dtSource;
                    gridItem.DataSource = dtSource;
                    gridItem.DataBind();

            }
        }


protected void btnAdd(object sender, EventArgs e)
        {
            DataTable dtSource = ViewState["dtSource"] as DataTable;          
            DataRow dr = dtSource.NewRow();
            dtSource.Rows.Add(DateTime.Now, itemDetail, "", "");
            gridItem.DataSource = dtSource;
            gridItem.DataBind();
            ViewState["dtSource"] = dtSource;
        }