当我有回发

Question

我目前有一个Gridview，它是根据文字输入动态创建的。

<asp:GridView ID="gvSession" runat="server" ShowFooter="false" CssClass="table table-striped table-bordered dataTable no-footer hover gvv" AutoGenerateColumns="true" ShowHeaderWhenEmpty="true">
      <Columns>
      </Columns>
    </asp:GridView> 

因此，每当我的网页都有PostBack时，controls中TextBox动态创建的Label和Gridview一直消失，因此，Gridview将保留先前创建的行数，但为空。

有没有办法保存＆＃39; Gridview的信息？或者我只是错误地创建了Gridview

以下是我创建Gridview的方式。

ASPX.CS

protected void tbClassSession_TextChanged(object sender, EventArgs e)
        {
            GenerateRows();
        }

        private void SetInitialRow()
        {
            int numbers = int.Parse(this.tbClassSession.Text.Trim());
            DataTable dt = new DataTable();
            //you can add as many rows you want 
            dt.Columns.Add("Session No.", typeof(string));
            dt.Columns.Add("Lesson Date", typeof(DateTime));
            for (int i = 0; i < numbers; i++)
            {
                dt.Rows.Add("", null);
            }
            gvSession.DataSource = dt;
            gvSession.DataBind();

        }

        protected void GenerateRows()
        {
            this.SetInitialRow();
            int numbers = int.Parse(this.tbClassSession.Text.Trim());

                int cellCount = this.gvSession.Rows[0].Cells.Count;
                int rowsCount = this.gvSession.Rows.Count;
                foreach (GridViewRow row in this.gvSession.Rows)
                {
                    Label label = new Label();
                    label.Text = (row.RowIndex + 1).ToString();
                    label.Attributes.Add("runat", "server");
                    row.Cells[0].Controls.Add(label);
                }

                int rowCount = 0;

                foreach (GridViewRow row in this.gvSession.Rows)
                {
                    TextBox textBox = new TextBox();
                    textBox.TextMode = TextBoxMode.Date;

                    textBox.Text = "Hello World"
                }

        }