动态地将itemplate添加到gridview

Question

我已经创建了gridview。 添加了一个文本框，以指定用户要动态添加到网格的列数，并成功完成。

我想在动态添加的字段中添加文本框以输入数据并将其保存到数据库（我能够在行中添加文本字段并保存数据），但是我还没有任何解决方案。

我已经尝试过itemplate，但是对此我不太了解。 我在下面添加了我的代码。 这是我的aspx代码

                        <input type="hidden" runat="server" value="0" id="columnAdded"/>
                    </td>
                </tr>
                <tr>
                    <td>

                    </td>
                </tr>
            </table>




<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
    <Columns>
        <%--<asp:CommandField ShowEditButton="True" />--%>

        <asp:TemplateField HeaderText="S. No.">
            <ItemTemplate>
                <asp:Label ID="lblsno"  runat="server" Text='<%#Container.DataItemIndex+1 %>'></asp:Label>
            </ItemTemplate>
            <FooterTemplate>
                <asp:LinkButton ID="lbInsert" runat="server">Insert</asp:LinkButton>
            </FooterTemplate>
        </asp:TemplateField>


           <asp:BoundField HeaderText="Parts" DataField="parts">

            </asp:BoundField>

         <%--<asp:TemplateField>
            <ItemTemplate>
                <asp:PlaceHolder ID="PlaceHolder_InputControl" runat="server" ></asp:PlaceHolder>
            </ItemTemplate>

        </asp:TemplateField>--%>

        <%--<asp:TemplateField>
            <ItemTemplate>
                <asp:Button ID="btnedit" runat="server" Text="Edit" CommandName="EditRow"/>
            </ItemTemplate>
        </asp:TemplateField>--%>

        </Columns>
</asp:GridView>

这是.cs

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        try
        {
            drpstation.Items.Clear();

            con.Open();
            SqlCommand cmd = con.CreateCommand();
            cmd.CommandType = CommandType.Text;
            cmd.CommandText = "select * from stationdesc where stndesc <> '' and id is not null";
            cmd.ExecuteNonQuery();
            DataSet ds = new DataSet();
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            da.Fill(ds, "stationdesc");

            drpstation.DataSource = ds.Tables[0];
            drpstation.DataTextField = ds.Tables[0].Columns["stndesc"].ColumnName.ToString();
            drpstation.DataValueField = ds.Tables[0].Columns["id"].ColumnName.ToString();
            drpstation.DataBind();
            drpstation.Items.Insert(0, new ListItem("Select Station", "0"));
        }
        catch (Exception ex)
        {
            string Msg = "select station error";
            Msg += ex.Message;
        }
        finally
        {
            con.Close();
        }
    }
    if (!IsPostBack)
    {

        griddisplay();


    }
}
public void griddisplay()
{
    try
    {
        con.Open();
        SqlCommand cmd = new SqlCommand("SELECT * FROM stnparts", con);
        SqlDataReader dr = cmd.ExecuteReader();
        GridView1.DataSource = dr;
        GridView1.DataBind();
        //DataTable dt = new DataTable();
        //dt.Columns.Add("Parts", typeof(string));
        //DataRow drr = dt.NewRow();
        //drr["Parts"] = "Weldmet";
        //dt.Rows.Add(drr);

        //drr = dt.NewRow();
        //drr["Parts"] = "MFG Parts";
        //dt.Rows.Add(drr);

        //GridView1.DataSource = dt;
        //GridView1.DataBind();

    }
    catch (Exception d)
    {
        string message = "grid error";
        message += d.Message;
    }
    finally
    {
        con.Close();
    }
}
protected void btnadd_Click(object sender, EventArgs e)
{
    int num;
    num = Convert.ToInt32(txtnumber.Text.Trim());
    int addedColumn = Convert.ToInt32(columnAdded.Value);
    for (int i = addedColumn + 1; i <= addedColumn + num; i++)
    {
        string name = "Unit";
        name = string.Concat(name, i);
        TemplateField test = new TemplateField();
        test.HeaderText = name;
        GridView1.Columns.Add(test);
        TextBox txtname = new TextBox();
        string txtunit = "txtunit";
        txtname.ID = txtunit + i;

    }
    griddisplay();
    columnAdded.Value = (addedColumn + num).ToString();
}

public class TemplateHandler : ITemplate
{


    void ITemplate.InstantiateIn(Control container)
    {
        TextBox txtbox = new TextBox();

        txtbox.Text = "test";
        txtbox.DataBinding += Txtbox_Binding;
        container.Controls.Add(txtbox);

    }

    private void Txtbox_Binding(object sender, EventArgs e)
    {
        //throw new NotImplementedException();
        TextBox txttest = (TextBox)sender;
        GridViewRow container = (GridViewRow)txttest.NamingContainer;
        //txttest.Text = ((TableNameClass)container.DataItem).SkillText;
        ((DataRowView)container.DataItem)["SkillText"].ToString();
    }
}

请帮忙

Answer 1

只是基于您发布的代码的伪/示例代码（未经测试！），请您多加注意

protected void btnadd_Click(object sender, EventArgs e)
{
    int num;
    num = Convert.ToInt32(txtnumber.Text.Trim());
    int addedColumn = Convert.ToInt32(columnAdded.Value);
    for (int i = addedColumn + 1; i <= addedColumn + num; i++)
    {
        string name = "Unit";
        name = string.Concat(name, i);
        TemplateField test = new TemplateField();
        test.HeaderText = name;
        test.ItemTemplate = new TemplateHandler (); // ** This line to set ItemTemplate is missing in the code you posted
        GridView1.Columns.Add(test);
       // ... Other code as you need
    }

}

希望这对您有所帮助。