Unexpected Behaviour When Using Request Parameters = True

[james.crossley]

Hello

I've created a series reports using with the report parameter Request Parameters = True.

My users are prompted to select or enter Variables for the reports. The Variables are used in my SQL queries. This works as expected.

However, when debugging today, I noticed that when a report is loaded, the SQL query is executed BEFORE the Parameter/Variable panel is displayed.

This occurs in the Web Viewer and WebFx Viewer.

This produces an unnecessary trip to the database (query) and is undesirable because the user hasn't entered the parameters yet.

Is there a way I prevent the SQL query from occurring until the user enters variables and clicks the Submit button?

Thanks
James

[HighAley]

Hello.

Please, try to set the Request Parameters property of the report to True. Then SQL queries will be executed after requesting of the parameters.

Thank you.

[james.crossley]

Hi Aleksey

I have checked the reports, the report Request Parameters property is set to True.

The SQL queries are being executed before the requesting of the panel.

The version I'm using is Web 2013.2.1612

[HighAley]

Hello.

If you need to disable SQL queries, please, set the Connect On Start of every Data Source to false and then in the Begin Render event Connect them.

Thank you.

[james.crossley]

Hi Aleksey

Thanks.

The version I'm using is Web 2013.2.1612 (Web and FX Viewers)

I can see how to set the Connect On Start of every Data Source to false, OK.

Please explain how I should Connect on the Begin Render event. Do I need to add Databand BeginRender event code inside the report for each databand and add a handler?

e.g.

Code: Select all

public void DataBandNAME__BeginRender(object sender, System.EventArgs e)
{
   // what is the code to connect?
}

this.DataBandNAME.BeginRender += new System.EventHandler(this.DataBandNAME__BeginRender);

Thanks for your help
James

[HighAley]

Hello.

Please explain how I should Connect on the Begin Render event. Do I need to add Databand BeginRender event code inside the report for each databand and add a handler?

You should to connect every necessary Data Sources in the Begin Render event of the report with Connect() method of each data source. For example,

Code: Select all

YourDataSourceName.Connect();

Thank you.

[james.crossley]

Hi Aleksey

Please excuse my ignorance. I'm unable to make this work. So far I have added a BeginRender method after the generated code as detailed below. I don't understand how it is called within the report. Do I need to add code to raise the BeginRender event? I assumed it would be called automatically.

Code: Select all

               #endregion StiReport Designer generated code - do not modify

		public void BeginRender(object sender, System.EventArgs e)
		{
			this.circuits.Connect();
			this.contacts.Connect();
			this.customer.Connect();
			this.items.Connect();
			this.jobs.Connect();
			this.licensee.Connect();
			this.notes.Connect();
		}

[HighAley]

Hello.

You should add the code on the Property Grid. Look at the attached image.

BeginRenderWeb.png (12.14 KiB) Viewed 3182 times

Thank you.

[james.crossley]

Hi Aleksey

The screen shot was just what I needed. I was looking in all the wrong places!!!

Thank you VERY much for the help.

Regards
James

[Andrew]

Hello,

We are always ready and glad to help you.

Thank you.