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Dynamic controls disappear

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

Marcel asked on 22 Jan 2013, 02:56 PM

Image1.PNG

Image2.PNG

Hi there,

I have a problem in using the radGrid in combination with user controls.

As you can see in the enclosed image (=Image1.png) I want to show some part detail infomation to the user by clicking the expand button of the grid.
The image shown is populated by a user control which is added to the placeholder in the code behind.

When I click the expand button for another part the image of the previous part disappears (=Image2.png)

I use the following code:

<NestedViewTemplate>

<asp:Panel ID="paPart" runat="server" GroupingText="Part info">

<table width="100%">

<tr>

<td width="5%"></td>

<td width="45%" valign="top">

<table>

<tr>

<td>Partnumber:</td>

<td><asp:Label ID="laPartnumber" runat="server"></asp:Label></td>

</tr>

<tr>

<td>Description:</td>

<td><asp:Label ID="laDescription" runat="server"></asp:Label></td>

</tr>

<tr>

<td>Weight:</td>

<td><asp:Label ID="laWeight" runat="server"></asp:Label></td>

</tr>

<tr>

<td>Volume:</td>

<td><asp:Label ID="laVolume" runat="server"></asp:Label></td>

</tr>

<tr>

<td>Package quantity:</td>

<td><asp:Label ID="laPackageQuantity" runat="server"></asp:Label></td>

</tr>

<tr>

<td>Unit of measure:</td>

<td><asp:Label ID="laUnitOfMeasure" runat="server"></asp:Label></td>

</tr>

</table>

</td>

<td align="center" width="50%">

<table width="100%">

<tr>

<td valign="top"><asp:PlaceHolder ID="phPartImage" runat="server"></asp:PlaceHolder></td>

<td> </td>

<td valign="top"><asp:PlaceHolder ID="phPartImageOther" runat="server"></asp:PlaceHolder></td>

</tr

</table>

</td>

</tr>

</table>

</asp:Panel>

</NestedViewTemplate>

</MasterTableView>

protected void grPart_ItemCommand(object source, Telerik.Web.UI.GridCommandEventArgs e)

{

if (e.CommandName == Telerik.Web.UI.RadGrid.ExpandCollapseCommandName)

{

Telerik.Web.UI.GridDataItem Item = e.Item as Telerik.Web.UI.GridDataItem;

if (!Item.Expanded)

{

Telerik.Web.UI.GridNestedViewItem NestedItem = (Telerik.Web.UI.GridNestedViewItem)Item.ChildItem;

//get part

NMHG.Data.Part.Part.Part Part = new NMHG.Data.Part.Part.Part();

Part.Partnumber = Item.GetDataKeyValue("Partnumber").ToString();

Part.GetPart();

//Partnumber

Label laPartnumber = (Label)NestedItem.FindControl("laPartnumber");

laPartnumber.Text = Part.Partnumber;

//Description

Label laDescription = (Label)NestedItem.FindControl("laDescription");

laDescription.Text = Part.Description;

//Weight

Label laWeight = (Label)NestedItem.FindControl("laWeight");

laWeight.Text = Part.Weight.ToString();

//Volume

Label laVolume = (Label)NestedItem.FindControl("laVolume");

laVolume.Text = Part.volume.ToString();

//Package quantity

Label laPackageQuantity = (Label)NestedItem.FindControl("laPackageQuantity");

laPackageQuantity.Text = Part.Package_Qty.ToString();

//Unit of measure

Label laUnitOfMeasure = (Label)NestedItem.FindControl("laUnitOfMeasure");

laUnitOfMeasure.Text = Part.Unit_of_Measure.ToString();

//Images

//get files image directory

bool PHOTO_FIRST = true; //1 of meerdere foto's

string FILENAME = Part.Partnumber.Replace(" ", "") + "*.jpg";

string DIRECTORY = ConfigurationManager.AppSettings.Get("DIR part images");

DirectoryInfo DIRINFO = new DirectoryInfo(DIRECTORY);

FileInfo[] BESTANDEN = DIRINFO.GetFiles(FILENAME);

foreach (FileInfo BESTAND in BESTANDEN)

{

//creeer usercontrol PartImage

Part.User_controls.PartImage PartImage = (Part.User_controls.PartImage)LoadControl("PartImage.ascx");

PartImage.FILENAME = Path.GetFileNameWithoutExtension(BESTAND.Name) + "*.jpg";

PartImage.DESCRIPTION = Part.Partnumber + " - " + Part.Description;

PartImage.THUMBNAIL = false;                                            //Use/show thumbnail

if (PHOTO_FIRST == true)

{

PartImage.WIDTH = 200;

PartImage.HEIGHT = 200;

PartImage.PARTIMAGE_FILL();

//add user control to placeholder

PlaceHolder phPartImage = (PlaceHolder)NestedItem.FindControl("phPartImage");

phPartImage.Controls.Add(PartImage);

}

else

{

PartImage.WIDTH = 50;

PartImage.HEIGHT = 50;

PartImage.PARTIMAGE_FILL();

//add user control to placeholder other

PlaceHolder phPartImageOther = (PlaceHolder)NestedItem.FindControl("phPartImageOther");

phPartImageOther.Controls.Add(PartImage);

//set empty row

Label label = new Label();

label.Height = Unit.Pixel(20);

phPartImageOther.Controls.Add(label);

}

PHOTO_FIRST = false;

}

Any idea?

Many thanx!

Marcel

Dynamic controls disappear

1 Answer, 1 is accepted