c# - rebuilding columns and adding a new dataset to DataListView -



c# - rebuilding columns and adding a new dataset to DataListView -

so using datalistview variant brightideassoftware c# project.

i utilize buttons alter view of datalistview. when button pressed next executed:

olv.datasource = null; olv.allcolumns = collist; olv.rebuildcolumns(); //fill olv info olv.datasource = dt;

the first button creates 1 column , changes view view.tile;.

the sec button creates 4 columns , changes view view.details;.

the new columns shown takes sec info show in list. takes longer when rebuild larger amount of columns.

when run application builds view 4 columns in view.details instantly. when switch first button view sec button view hangs moment.

in debug mode noticed rebuildcolumns() 1 hangs. if leave olv.datasource = dt; out, code after rebuildcolumns() executed immediatly.

can explain me why happening?

thanks

first of not clear me if lists switching between utilize same datatable (i assume that's type of dt object). if source identical needn't add together , remove columns, can set olvcolumn.isvisible. that's faster.

second, setting objectlistview.datasource = null won't remove items list (you need objectlistview.clearobjects that), invalidate internal datasourceadapter.currencymanager block item updates until objectlistview.datasource set again. setting info source add together items list (calls objectlistview.buildlist) might expensive if source large.

in conclusion:

if switch between lists shared datasource then:

foreach (var column in this.datalistview.allcolumns) column.isvisible = true; // phone call when tampering columns this.datalistview.rebuildcolumns(); // if need add/remove items, same philosophy, partial instead of // finish update utilize filtering instead of datasource reset

if lists not have mutual datasource , hence columns totally differ, cost have pay, rebuilding columns , items, escape tabcontrol instance. switch between lists without having reset datasource time. should 1 time experience.

c# objectlistview

Comments

Post a Comment

Popular posts from this blog

assembly - What is the addressing mode for ld, add, and rjmp instructions? -

assembly - What is the addressing mode for ld, add, and rjmp instructions? - hey guys know ldi (load immediate) addressing mode set immediate , st instruction addressing mode set index. however, have no thought others curious are! thanks :) the addressing modes explained in instruction set, in first few pages. in table of instructions see operands instruction determine addressing mode. mode indicated arguments assembly instruction. for example, ld had several different ways of operating, depending on arguments. 1 of them ld rd,x d number of register, such ld r3,x . ld r3,-z else (although both indirect addressing). rjmp k relative addressing, jumping pc + k + 1. add rr,rd direct register addressing. result contained in rd. assembly avr instructions
Read more

vowpalwabbit - Interpreting Vowpal Wabbit results: Why are some lines appended by "h"? -

vowpalwabbit - Interpreting Vowpal Wabbit results: Why are some lines appended by "h"? - below part of log training vw model. why of these lines followed h? you'll notice that's true of "average loss" line in summary @ end. i'm not sure means, or if should care. ... average since illustration illustration current current current loss lastly counter weight label predict features 1.000000 1.000000 1 1.0 -1.0000 0.0000 15 0.500000 0.000000 2 2.0 1.0000 1.0000 15 1.250000 2.000000 4 4.0 -1.0000 1.0000 9 1.167489 1.084979 8 8.0 -1.0000 1.0000 29 1.291439 1.415389 16 16.0 1.0000 1.0000 45 1.096302 0.901166 32 32.0 -1.0000 -1.0000 21 1.299807 1.503312 64 64.0 -1.0000 1.0000 ...
Read more

Is there a way to convert an HTML page styled with Bootstrap CSS into email-compatible html? -

Is there a way to convert an HTML page styled with Bootstrap CSS into email-compatible html? - is there way convert html page styled bootstrap css html email compatible form? see there exclusively different css frameworks, ink, creating email compatible html, there flow creating email doesn't require utilize of different css framework? there html -> pdf -> email html flow? or other flow? no, couple of reasons... first, there no reliable css or html email. clients on place in terms of css back upwards & how render html, structural/semantic problem. isn't converting classes much altering html structure. as explained in this css tricks post, typical solution ol-skool techniques table-based layouts, requiring exclusively restructure existing html. have add together client-specific hacks. second, , more importantly, shouldn't send everything on existing page email. if it's newsletter subscribers, people won't read it. instead, create ...
Read more