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Is there a good source for 3rd party QT GUI controls?


Is there a good source for 3rd party QT GUI controls?

By : user3851206
Date : October 17 2020, 11:12 PM
this will help Qwt is a source for graphing and technical components and Solutions Catalog has the property browser as well as many other useful widgets.
Also available are the Embedded Widget Demos, ofi-labs, and qt-labs.
code :


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What are some good 3rd party controls for Windows Mobile?

What are some good 3rd party controls for Windows Mobile?


By : Heath
Date : March 29 2020, 07:55 AM
wish of those help There might be some useful-ish replies in this question.
If controls are always binded to data source controls in the order they are declared then

If controls are always binded to data source controls in the order they are declared then


By : Vice
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Your first assumption is correct.
To your second question, it depends on whether it is a post back or not and/or if you are binding explicitly. If it is not the post back and binding happens automatically then, roughly speaking, the value of the ControlParameter is retrieved when DataSourceView calls Select on DataBind, right before OnSelecting event. The sequence for the gridview (and any given control for that matter) is as follows:
code :
Page.ProcessRequest
Page.PreRenderRecursiveInternal
...
GridView.EnsureChildControls
GridView.CreateChildControls
GridView.DataBind
GridView.PerformSelect
DataSourceView.Select //comes from either SQLDataSource or LinqDataSource
DataSourceView.ExecuteSelect
//for Linq:
    LinqDataSourceView.GetParameterValues(WhereParameters)
//for SQL:
    SqlDataSourceView.InitializeParameters(SelectParameters)
Parameters.GetValues
Parameters.UpdateValues //this is where values get retrieved using reflection
DataSourceView.OnSelecting //follows almost immediately
...get data...
DataSourceView.OnSelected
...request...
PerformPreInit
InitRecursive //SqlDataSource subscribes to Page.LoadComplete
OnInitComplete
if PostBack
    LoadAllState //the view state gets loaded
    ProcessPostData
OnPreLoad
LoadRecursive
if PostBack
    ProcessPostData
    RaiseChangedEvents
    RaisePostBackEvents //you handle your events
//notice that following sections assume that you did not do any data 
//binding inside your events
OnLoadComplete //This is where parameters (SelectParemeters/WhereParemeters)
    //get updated. At this point none of them are data bound yet.
    //And if it the first time, there are no values
    //as the ViewState is empty for them.
PreRenderRecursiveInternal //calls the DataBind (if you haven't already), 
    //then DataSourceView.Select; parameters evaluate their controls.
    //The control C would be bound at this point.
PerformPreRenderComplete
SaveAllState
OnSaveStateComplete
RenderControl
public class ControlParameter : Parameter
{
    public string ControlID { get; set; } //stored in ViewState
    public string PropertyName { get; set; } //stored in ViewState

    protected override object Evaluate(HttpContext context, Control owner)
    {
        Control sourceControl = DataBoundControlHelper.FindControl(owner, this.ControlID);
        //evaluate C.C1 using reflection
        return DataBinder.Eval(sourceControl, this.PropertyName);
    }

    internal void UpdateValue(HttpContext context, Control owner)
    {
        //PostBack or not, read stored value (on initial load it is empty)
        object storedValue = this.ViewState["ParameterValue"];
        //Get the actual value for this parameter from C.C1
        object actualValue = this.Evaluate(context, owner);
        //Store received value
        this.ViewState["ParameterValue"] = actualValue;
        //Fire a change event if necessary
        if ((actualValue == null && storedValue != null)
         || (actualValue != null && actualValue != storedValue))
            this.OnParameterChanged();
    }
}

public class SqlDataSource : DataSourceControl
{
    //fired by OnLoadComplete
    private void LoadCompleteEventHandler(object sender, EventArgs e)
    {
        //UpdateValues simply calls the UpdateValue for each parameter
        this.SelectParameters.UpdateValues(this.Context, this);
        this.FilterParameters.UpdateValues(this.Context, this);
    }
}

public class SqlDataSourceView : DataSourceView, IStateManager
{
    private SqlDataSource _owner;

    //this method gets called by DataBind (including on PreRenderRecursiveInternal)
    protected internal override IEnumerable ExecuteSelect(DataSourceSelectArguments arguments)
    {
        DbConnection connection = this._owner.CreateConnection(this._owner.ConnectionString);
        DbCommand command = this._owner.CreateCommand(this.SelectCommand, connection);
        //This is where ControlParameter will read C.C1 values again.
        //Except this time, C.C1 will be already populated by its own DataBind
        this.InitializeParameters(command, this.SelectParameters, null);

        command.CommandType = GetCommandType(this.SelectCommandType);
        SqlDataSourceSelectingEventArgs e = new SqlDataSourceSelectingEventArgs(command, arguments);

        this.OnSelecting(e);

        if (e.Cancel)
            return null;

        //...get data from DB

        this.OnSelected(new SqlDataSourceStatusEventArgs(command, affectedRows, null));

        //return data (IEnumerable or DataView)
    }

    private void InitializeParameters(DbCommand command, ParameterCollection parameters, IDictionary exclusionList)
    {
        //build exlusions list
        //...
        //Retrieve parameter values (i.e. from C.C1 for the ControlParameter)
        IOrderedDictionary values = parameters.GetValues(this._context, this._owner);

        //build command's Parameters collection using commandParameters and retrieved values
        //...
    }
}
if ((actualValue == null && storedValue != null)
 || (actualValue != null && actualValue != storedValue))
    this.OnParameterChanged();
Can third party hosts be trusted for closed-source/private source code management?

Can third party hosts be trusted for closed-source/private source code management?


By : DanZ
Date : March 29 2020, 07:55 AM
I wish did fix the issue. I think it all depends on how much a firm is comfortable outsourcing. There are a lot of common IP work pieces to outsource. Here are some, along with the risks to IP:
Development: Contract programmers may know a lot about your IP Hosting: Your Web host has all of your code Accounting: Accountants know all the details about your financials Legal: Attorneys know all the details about acquisitions, pre-filed patents, etc. Manufacturing: Contract manufacturers have all the IP related to producing your product Email: Outsourced email gives your host a single database with all your communications Telephony: Your telephone company could snoop on your lines
Invite Suggestions of good 3rd-party controls for asp.net development

Invite Suggestions of good 3rd-party controls for asp.net development


By : Jeffrey O
Date : March 29 2020, 07:55 AM
will help you The consensus here at SO seems to be DevExpress. Telerik and ComponentArt are good, too. DevExpress seems to be the fastest performer.
Are third party controls as good a value for WPF as they are for Winforms?

Are third party controls as good a value for WPF as they are for Winforms?


By : user1561669
Date : March 29 2020, 07:55 AM
hop of those help? The architecture makes it easier to develop your own decent-looking controls Yes, I would use third party controls (I am doing this right now) The main factor is the set of controls you're considering, and how you plan to use them.
The main issue I've found with third party controls for WPF is that they aren't quite as mature, for the most part, as the Windows Forms equivelencies. You can do more in WPF yourself, so I don't know if the bar is quite as high as with Windows Forms. However, there is a point where having a very clean UI, very quickly is worth the extra cost of the third party controls.
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