vb.net - SOLVED: Adding and Populating DataGridViewComboBoxcolumn to Bound Datagridview -


edited show correct solution inline in case searched others in future

i'm attempting allow datagridview allow user edit fields (for simplicity's sake, let's it's items, each of can have condition, allowable values taken second table [conditions]

e.g.

data structure (simplified)

items table

  • id (primary key--not shown)
  • itemnum
  • qty
  • conditionabbrev (e.g. "new", "used", "recert") -- used key item in conditions table below

conditions table

  • conditionabbrev (e.g. "new", "used", "recert", etc.
  • conditiondescription (lengthy description of condition)

desired appearance of grid:

my grid should like:

item #   qty   condition 123456   10    [ new  v]   <-- drop-down 234567   55    [ used v]    345678   99    [ new  v]    etc.

the strategy:

i'm attempting set by:

  1. binding grid first items table (grabbing first 3 columns contain actual values of each line of items table)

  2. creating new datagridviewcomboboxcolumn ("condcombo") , binding allowable items conditions table it,

    3. looping through grid , setting value of condcombo each row value of conditions row not necessary it'll handled automatically dataproperty (see below)

  3. hiding conditions (text) column.

the problem:

i'm able column added , loaded conditions values, i'm utterly failing @ setting selected value match condition items table; furthermore, selections i'm making in combo being blanked moment tab or click cell.

here's code i've got far: hugely appreciated!

corrected code shown below:

sub setupgrid(byref mygrid datagridview,                myconn sqlite.sqliteconnection)      dim myadapter system.data.sqlite.sqlitedataadapter      mygrid.virtualmode = true     myadapter = new system.data.sqlite.sqliteadapter(_         "select id, itemnum, qty, condition items", myconn)     myadapter.selectcommand.commandtype = commandtype.text      ' fill main grid item data     dim ds new dataset     myadapter.fill(ds)     mygrid.datasource = ds.tables(0)      ' create , load combobox column     dim cbocolumn new datagridviewcomboboxcolumn     cbocolumn         .datapropertyname = "conditionabbrev"         .name = "condcombo"         .headertext = "cond"          ' bind combocolumn         dim conditionsadapter system.data.sqlite.sqlitedataadapter         dim condtable datatable         using cmd new sqlite.sqlitecommand(_             "select conditionabbrev conditions", myconn)             conditionsadapter.selectcommand = cmd             conditionsapapter.fill(condtable)          end using           .datasource = condtable          'incorrect: .datapropertyname = "conditionabbrev"          .datapropertyname = "condition" ' name of linked value in items table. changes combobox automatically reflected here.          .valuemember = "conditionabbrev"          .displaymember = .valuemember       end       ' set selected combo member same condition (text) field value:      ' no longer needed (since work done automatically dataproperty linkage above )       ' each currow datagridviewrow in mygrid.rows()      '     currow.cells("condcombo").value = _      '         currow.cells("condition").value      ' next         ' hide condition (text) field)       mygrid.columns("condition").visible = false        ' hide id field       mygrid.columns("id").visible = false end sub

you're setting datapropertyname incorrectly. bind 1 list grid , 1 column. displaymember , valuemember names of columns/properties of items bound column. datapropertyname name of column/property of items bound grid. in case, looks me datapropertyname should set "condition".


Comments

Post a Comment

Popular posts from this blog

java - pagination of xlsx file to XSSFworkbook using apache POI -

right in code, reading xlsx file, xssfworkbook, , writing database. but, when size of xlsx file increases, causes outofmemory error. can not increase server size, or divide xlsx file pieces. tried loading workbook using file (instead of inputstream), didn't either. i looking way read 10k rows @ time (instead of entire file @ once) , iteratively write workbook , database. is there way apache poi? poi contains called "eventmodel" designed purpose. it's mentioned in faq : the ss eventmodel package api reading excel files without loading whole spreadsheet memory. require more knowledge on part of user, reduces memory consumption more tenfold. based on awt event model in combination sax. if need read-only access, best way it. however, may want double check first if issue somewhere else. check out this item : i think poi using memory! can do? 1 comes quite lot, reason isn't might think. so, first thing check - what's source of prob...
Read more

Unlimited choices in BASH case statement -

consider simple bash snippet: case $option in 1) image=${options[0]%.tar} ;; 2) image=${options[1]%.tar} ;; 3) image=${options[2]%.tar} ;; 4) image=${options[3]%.tar} ;; *) echo "invalid option" exit 1 esac in real script numbers goes 30. makes pretty long. can somehow specify cases variable? something this: case $option in $i) image=${options[$(($i-1))]%.tar} any pointer appreciated. you can match against multiple patterns in single clause: case $option in 1|2|3: echo "$option one, 2 or three" ;; esac if still typing you, can use simple pattern matching: case $option in # following matches # - single-digit numbers 0-9 # - two-digit numbers starting either 1 or 2 # - number 30 [0-9]|[12][0-9]|30) image=${options[$(($option-1))]%.tar} ;; *) echo "invalid option" 1>&2 exit 1 esac
Read more

apache - How do I stop my index.php being run twice for every user -

we've got webapp initial html served using apache , php. i noticed index.php being run twice every request. seems caused / effected rewrite rules in our .htaccess - rewritecond %{http_host} ^(www\.|hotels\.)ourdomain\.com$ [nc,or] rewritecond %{server_name} ^(www\.|hotels\.)ourdomain\.com$ [nc] rewriterule (.*) http://ourdomain.com/$1 [r=301] rewriterule ^hotels/([^/]+)/?\??(.*)$ ?d=$1&$2 [qsa] the final rule moving parameter url path query string. i.e. http://ourdomain.com/hotels/vegas?someparam=1 becomes http://ourdomain.com?d=vegas&someparam=1 if go directly query string version index.php run once. if use url redirected, index.php run twice (i'm checking adding error_log('end of index.php') file). so example going http://ourdomain.com/hotels/paris hits file twice http://ourdomain.com?d=paris hits once. i've seen this question , had @ blog mentioned , , can't find empty string url's (i've tried using yslow process). ...
Read more