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Update UserControl fields in RadDock

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Dock

This is a migrated thread and some comments may be shown as answers.

RadTony asked on 16 Feb 2010, 05:44 PM

I load Usercontrols dynamically in RadDocks.

I wish to Edit, update, cancel edition, see details of an Employee etc.

How can I do this ? I'm always getting the mistake : "Several controls with same ID have been found".

Also, please tell me if I can do better. Thanks

This is my user control :

                    <%@ Control Language="C#" AutoEventWireup="true" CodeFile="UCEmployee.ascx.cs" Inherits="UCEmployee" %>         
            <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>          
                     
            <table border="0" width="100%">         
                <tr>          
                    <td align="left" colspan="2">LastName : </td>         
                    <td align="left" colspan="2"> <asp:TextBox runat="server" ID="TxtNom"></asp:TextBox> </td>         
                </tr>         
                <tr>          
                    <td align="left" colspan="2">FirstName :</td>         
                    <td align="left" colspan="2"> <asp:TextBox runat="server" ID="TxtPrenom"></asp:TextBox> </td>         
                      
                </tr>             
                <tr>                 
                    <td colspan="4">&nbsp;</td>         
                </tr>             
                         
                <tr>               
                         
                    <td colspan="4">          
                        <nobr>         
                        <asp:Button runat="server" ID="BtnUpdate" Text="Update" OnClick="BtnUpdate_Click"/> &nbsp;         
                        <asp:Button runat="server" ID="BtnCancel" Text="Cancel"  OnClick="BtnCancel_Click"/> &nbsp;         
                        <asp:Button runat="server" ID="BtnDetails" Text="Details"  OnClick="BtnDetails_Click"/> &nbsp;         
                        </nobr>         
                     </td>         
                </tr>           
            </table>         
                     
            ---------------------------------------         
                     
                     
            using System;           
            using System.Data;           
            using System.Configuration;           
            using System.Collections;           
            using System.Web;           
            using System.Web.Security;           
            using System.Web.UI;           
            using System.Web.UI.WebControls;           
            using System.Web.UI.WebControls.WebParts;           
            using System.Web.UI.HtmlControls;           
            using Telerik.Web.UI;         
            using System.Data;         
            using System.Data.SqlClient;         
                      
            public partial class UCEmployee : System.Web.UI.UserControl           
            {         
                int currentIndex = 0;         
                protected void Page_Load(object sender, EventArgs e)         
                {         
                    if (currentIndex > 0)         
                    {         
                        DataTable dt = getEmployeeById(currentIndex);         
                     
                        if (dt != null && dt.Rows.Count > 0)         
                        {         
                            TxtNom.Text = dt.Rows[0]["FirstName"].ToString();         
                            TxtPrenom.Text = dt.Rows[0]["LastName"].ToString();         
                        }         
                    }         
                     
                }         
                public UCEmployee()         
                {         
                }         
                public UCEmployee(int passedIndex)         
                {         
                    currentIndex = passedIndex;         
                }         
                     
                private DataTable getEmployeeById(int EmployeeID)         
                {         
                    DataSet ds = new DataSet();         
                     
                    using (SqlConnection conn = new SqlConnection())         
                    {         
                        conn.ConnectionString = GetConnectionString();         
                        SqlCommand cmd = new SqlCommand("SELECT [EmployeeID], [LastName], [FirstName], [Title], [ReportsTo], [Photo], [Notes] FROM [Employees] where EmployeeID = " + EmployeeID, conn);         
                        conn.Open();         
                     
                        SqlDataAdapter sqlAdapter = new SqlDataAdapter(cmd);         
                     
                        sqlAdapter.Fill(ds);         
                    }         
                     
                    DataTable dt = ds.Tables[0];         
                    return dt;         
                }         
                     
                static private string GetConnectionString()         
                {         
                    return "server=STATION00374;database=Northwind;Integrated Security=SSPI;";         
                }         
                     
                     
                protected void BtnUpdate_Click(object sender, EventArgs e)         
                {          
                             
                }         
                     
                protected void BtnCancel_Click(object sender, EventArgs e)         
                {         
                     
                }         
                     
                protected void BtnDetails_Click(object sender, EventArgs e)         
                {         
                     
                }         
            }         

And this is my Page where I load all employees :

                    <%@ Page Language="C#" AutoEventWireup="true" CodeFile="TestUcEmployee.aspx.cs" Inherits="TestUcEmployee" %>         
                     
            <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>          
            <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">          
                      
            <html xmlns="http://www.w3.org/1999/xhtml" >          
            <head id="Head1" runat="server">           
                <title>Untitled Page</title>          
            </head>          
            <body>          
                <form id="form1" runat="server">           
                <div>          
                <asp:ScriptManager ID="ScriptManager1" runat = "server"></asp:ScriptManager>          
                         
                <br />         
                <br />         
                         
                <table>         
                    <tr>         
                         
                      <td style="width:100px"> </td>         
                      <td align="right" id="tdDocks" runat="server" style="width:1000px">                      
                      </td>         
                              
                     </tr>         
                 </table>          
                </div>          
                </form>          
            </body>          
            </html>          
                     
                     
            ------------------------------------         
                     
            using System;           
            using System.Data;           
            using System.Configuration;           
            using System.Collections;           
            using System.Web;           
            using System.Web.Security;           
            using System.Web.UI;           
            using System.Web.UI.WebControls;           
            using System.Web.UI.WebControls.WebParts;           
            using System.Web.UI.HtmlControls;           
            using Telerik.Web.UI;           
            using System.Reflection;           
                      
            using System.Configuration;           
            using System.Collections.Generic;           
                      
            public partial class TestUcEmployee : System.Web.UI.Page           
            {         
                     
                protected void Page_Load(object sender, EventArgs e)         
                {         
                     
                    RadDockLayout layout1 = new RadDockLayout();         
                    RadDockZone zone1 = new RadDockZone();         
                    for (int i = 1; i < 12; i++)         
                    {         
                     
                     
                     
                        zone1.Width = Unit.Pixel(900);         
                        zone1.Orientation = Orientation.Horizontal;         
                        if (i % 2 == 0)         
                        {         
                            zone1.BackColor = System.Drawing.Color.PeachPuff;         
                        }         
                        else         
                        {         
                            zone1.BackColor = System.Drawing.Color.AliceBlue;         
                        }         
                     
                     
                        RadBinaryImage image = new RadBinaryImage();         
                        image.ResizeMode = BinaryImageResizeMode.Fit;         
                        image.Height = Unit.Pixel(100);         
                        image.Width = Unit.Pixel(70);         
                     
                        LiteralControl liSpace = new LiteralControl("&nbsp;");         
                        LiteralControl liTitle = new LiteralControl("Title");         
                     
                     
                        Table table = new Table();         
                        table.BorderWidth = Unit.Pixel(0);         
                        table.Width = Unit.Percentage(85);         
                        TableRow tr1 = new TableRow();         
                        TableRow tr2 = new TableRow();         
                     
                        tr1.HorizontalAlign = HorizontalAlign.Center;         
                        tr2.HorizontalAlign = HorizontalAlign.Center;         
                     
                        TableCell tc1 = new TableCell();         
                        tc1.Controls.Add(liSpace);         
                        TableCell tc2 = new TableCell();         
                        /*         
                        if (!dt.Rows[i]["Photo"].Equals(System.DBNull.Value))         
                        {         
                            image.DataValue = (byte[])dt.Rows[i]["Photo"];         
                        }         
                        tc2.Controls.Add(image);         
                        */         
                        Control widget = LoadControl("UCEmployee.ascx", i);         
                        tc2.Controls.Add(widget);         
                     
                        TableCell tc3 = new TableCell();         
                        tc3.Controls.Add(liSpace);         
                     
                        tr1.Cells.Add(tc1);         
                        tr1.Cells.Add(tc2);         
                        tr1.Cells.Add(tc3);         
                     
                        TableCell tc4 = new TableCell();         
                        tc4.Controls.Add(liSpace);         
                        TableCell tc5 = new TableCell();         
                        tc5.Controls.Add(liSpace);         
                        TableCell tc6 = new TableCell();         
                        tc6.Controls.Add(liSpace);         
                     
                        tr2.Cells.Add(tc4);         
                        tr2.Cells.Add(tc5);         
                        tr2.Cells.Add(tc6);         
                     
                        table.Controls.Add(tr1);         
                        table.Controls.Add(tr2);         
                     
                     
                     
                        RadDock dock = new RadDock();         
                        dock.UniqueName = Guid.NewGuid().ToString();         
                        dock.ID = string.Format("RadDock{0}", dock.UniqueName);         
                        dock.Title = "Title";//dt.Rows[i]["FirstName"].ToString() + " " + dt.Rows[i]["LastName"].ToString();         
                        dock.TitlebarContainer.HorizontalAlign = HorizontalAlign.Center;         
                     
                        dock.ContentContainer.Controls.Add(table);         
                     
                     
                        RadDock dockSpace = new RadDock();         
                        dockSpace.UniqueName = Guid.NewGuid().ToString();         
                        dockSpace.ID = string.Format("RadDock{0}", dock.UniqueName);         
                        dockSpace.Style["Width"] = "900px";         
                     
                        if (i % 3 == 0)         
                        {         
                            dock.Style["Width"] = "300px";         
                     
                            zone1.Controls.Add(dock);         
                     
                            dockSpace.ContentContainer.Controls.Add(new LiteralControl("<table width='100%' height='10px' border='0'><tr><td>&nbsp;</td> <td>&nbsp;</td>&nbsp;<td></td></tr></table>"));         
                            zone1.Controls.Add(dockSpace);         
                        }         
                        else         
                        {         
                            dock.Style["Width"] = "300px";         
                     
                            zone1.Controls.Add(dock);         
                        }         
                     
                    }         
                    layout1.Controls.Add(zone1);         
                    tdDocks.Controls.Add(layout1);         
                }         
                     
                     
                private UserControl LoadControl(string UserControlPath, params object[] constructorParameters)         
                {         
                    List<Type> constParamTypes = new List<Type>();         
                    foreach (object constParam in constructorParameters)         
                    {         
                        constParamTypes.Add(constParam.GetType());         
                    }         
                     
                    UserControl ctl = Page.LoadControl(UserControlPath) as UserControl;         
                     
                    // Find the relevant constructor           
                    ConstructorInfo constructor = ctl.GetType().BaseType.GetConstructor(constParamTypes.ToArray());         
                     
                    //And then call the relevant constructor           
                    if (constructor == null)         
                    {         
                        throw new MemberAccessException("The requested constructor was not found on : " + ctl.GetType().BaseType.ToString());         
                    }         
                    else         
                    {         
                        constructor.Invoke(ctl, constructorParameters);         
                    }         
                     
                    // Finally return the fully initialized UC           
                    return ctl;         
                }          
                           
            }           
                     

1 Answer, 1 is accepted

answered on 19 Feb 2010, 11:31 AM

Hello RadTony,

The problematic code is the following:

RadDock dock = new RadDock();

dock.UniqueName = Guid.NewGuid().ToString();

dock.ID = string.Format("RadDock{0}", dock.UniqueName);

dock.Title = "Title";//dt.Rows[i]["FirstName"].ToString() + " " + dt.Rows[i]["LastName"].ToString();

dock.TitlebarContainer.HorizontalAlign = HorizontalAlign.Center;

dock.ContentContainer.Controls.Add(table);

RadDock dockSpace = new RadDock();

dockSpace.UniqueName = Guid.NewGuid().ToString();

dockSpace.ID = string.Format("RadDock{0}", dock.UniqueName);

dockSpace.Style["Width"] = "900px";

Notice the highlighted lines - dock and dockSpace will have the same ID and an error will be thrown. So if you replace dockSpace.ID = string.Format("RadDock{0}", dock.UniqueName); with
dockSpace.ID = string.Format("RadDock{0}", dockSpace.UniqueName); there shouldn't be any problems. You should dynamically create RadDock's in the Page_Init so that the docks will be positioned in the correct zone and at the correct index (if you plan on saving the DockState). Please take a look at the following projects from our Code Library. They show how to dynamically create docks and save their state in DB:

Greetings,
Pero
the Telerik team

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