I have a large grid and I need to add a count in the footer, to calculate count of non-nullable and not empty cells in column, but standart count aggregate gives only completed total count result. In custon templates I find ability only for using these completed aggregation functions (min, max, sum, count...). Is there any ideas how to count only filled cells in column and display result in footer of grid?
You can configure the columns.footerTemplate property as a function, and use some custom logic to count the non-null fields, then display it in the footer of the respective column, e.g.:
Example
If someone interests how I have solved it, I will answer in general.
I have created custom column in result's data (before binding it to grid) with values 1 or 0: 1 - if I want to count current row in result; 0 - if I don't. Then I have used sum aggregate function for this column instead count. And then I just only have not displayed this column in grid for users.
This approach gives ability to write your custom logic outside of kendo footer template, you just use count (in this case sum) for results of your custom logic.
All other approaches and solutions, which I've tried did not help.
Related
I try to add a new calculated column to sharepoint list that will show elapsed day. I enter name and write a formula like;
=ABS(ROUND(Today-Created;0))
The data type returned from this formula is: Single line of text
When I want to save I get an error like
Calculated columns cannot contain volatile functions like Today and
Me.
Calculated Column Values Only Recalculate As Needed
The values in SharePoint columns--even in calculated columns--are stored in SharePoint's underlying SQL Server database.
The calculations in calculated columns are not performed upon page load; rather, they are recalculated only whenever an item is changed (in which case the formula is recalculated just for that specific item), or whenever the column formula is changed (in which case the formula is recalculated for all items).
(As a side note, this is the reason why in SharePoint 2010 you cannot create or change a calculated column on a list that has more than the list view threshold of 5000 items; it would require a mass update of values in all those items, which could impact database performance.)
Thus, in order for calculated columns to accurately store "volatile" values like "Me" and "Today", SharePoint would need to somehow constantly recalculate those column values and continuously update the column values in the database. This simply isn't possible.
Alternatives to Calculated Columns
I suggest taking a different approach entirely instead of using a calculated column for this purpose.
Conditional Formatting: You can apply conditional formatting to highlight records that meet certain criteria. This can be done using SharePoint Designer or HTML/JavaScript.
Filtered List views: Since views of lists are queried and generated in real time, you can use volatile values in list view filters. You can set up a list view web part that only shows items where Created is equal to [Today]. Since you can place multiple list view web parts on one page, you could have one section for today's items, and another web part for all the other items, giving you a visual separation.
A workflow, timer job, or scheduled task: You can use a repeating process to set the value of a normal (non-calculated) column on a daily basis. You need to be careful with this approach to ensure good performance; you wouldn't want it to query for and update every item in the list if the list has surpassed the list view threshold, for example.
I found some conversations about this issue. Many people suggest to creating a new Date Time column, visible is false, default value is Today's Date and it will be named as Today. Then we can use this column in our formulas.
I tried this suggestion and yes error is gone and formula is accepted but calculated columns' values are wrong. I setted column Today is visible and checked, it was empty. Default value Today's Date was not working. When I looking for a solution for this issue I deleted column Today carelessly. Then I realized calculated columns' values are right.
Finally; I don't know what is trick but before using Today keyword in your formulas if you create a column named as Today and after your formula saving if you delete Today column, it is working.
UPDATE
After #Thriggle's answer I realized this approach doesn't work like a charm. Yes, formula doesn't cause an error when calculated column saving but it works correctly only first time, in the next day the calculated column shows old values, because its values are static as Thriggle explained.
being a newbie to SSRS, I am trying to figure out the following:
say for instance I have a dataset which does a :
SELECT [cols...] from [some view]
I want to be able to further filter this based on parameters given from an ASP.NET site (I am using the AJAX control toolkit for the report viewer). There could be x amount of parameters and potentially can be filtered on 1 or more columns.
First question is, how would I filter the dataset and pass along the parameters along with which field the filter should apply to? I may have [col1] and I want to filter it with x values.
Second question Is, I want to be able to group the results per page based upon a column. So for each grouped result set, I want them to be displayed per page (per group per page).
Then on the headers of the page, I want it to display what the page grouping is. How would I do this?
In terms of what have I tried - nothing as I DO NOT KNOW HOW, it is why I am asking the question here to see what the experts (you) can suggest and guide me.
thank you!
To do this you can create Parameters in SSRS, they do not need to be in your query or anything. Then, go to your tablix and click either ROW or column depending on the filter type and set it show/hide visibility. For example I have a report that has personal information, so i have true/false parameter that hides/shows those columns, similar I have one that hides/shows any row with a -1 for the total paid.
I have the following issue: I'm generating a Top10 list of items, based on how many times each item has been sold. I can calculate that number and store it in a variable correctly, but when I try to sort the grid by that variable programatically, Genexus won't let me (ofcourse I can click on that row and it'll get sorted correctly, but that's not what I want).
As far as I've read, grids can't be sorted using variables for some reason, is there a workaround for this?
You should use a Data Provider to load a SDT with the Top10 list of items, sorted by solded items. Then show the output SDT in a grid.
You should try to find a way to load them in the proper order.
If that is not posible, create an SDT Collection with the items and use the method sort.
After that, change the grid to a non-base table grid and use the load event to load the content of the collection.
I am using Devexpress XtraGrid Control, Here I can count the number of rows in footer of grid. but for this I need to set count property of SummeryItem in grid for at least one column. I dont want to do like this.
I want count number of rows in xtraGrid without referring any one column in grid. I just want to show number of rows count. when user will filter that rows, at that time count also need to be changed.
Is there any option to show this number in Group header panel?
I'd use BaseView.RowCount to get the row count and draw it within CustomDrawGroupPanel event.
You can use the customsummarycalculate event to count the number of rows currently shown in the filtered collection and display it in the summary area (generally, I put that text in the summary area of the ID field for the collection I'm using - as I never have a need to put anything else there).
I don't know if this is an update but:
int i = view.SelectedRowsCount;
I have a situation where I'm populating a gridview with a bound data source, and want two additional rows at the very bottom; one to show the sum of values in the columns and one to show the average of values in the columns. I can quite easily calculate these values by aggregating information taken from the rowDataBound event, but don't know how to go about manually adding the additional two rows to the gridview. Any help much appreciated.
You can use the Footer just like you use Headers in gridview. Another solution is use a query in such way:
query 1 : your original query
UNION
query 2 : your query which contains sum
(This applies only if you don't apply paging to your grid)
If it's a single row of information you can use summary footer. See Displaying Summary Information in the GridView's Footer.
(source: asp.net)
If you want two additional rows, you can stuff rows into an IList. At the business logic layer, you can add more rows to the list returned by DAL.