c# - DataView row Filtering -


i have 2 dataview trying sort, in dgtest1 trying exception of data contains typeid != 25 , in dgtest2 trying show data typeid == 25.

when step through code throwing error on saying

"cannot interpret token '!' @ position 6".

can show me how use string row filter?

the parameters (data table table, string rowfilter, string sort, dataviewrowstate) 

dgtest1.itemssource = new dataview(dttest1, "typeid!= 25", "", dataviewrowstate.currentrows); dgtest2.itemssource = new dataview(dttest1, "typeid == 25", "", dataviewrowstate.currentrows);

the correct syntax use rowfilter expression in first dataview constructor is

dgtest1.itemssource = new dataview(dttest1, "typeid <> 25", "", dataviewrowstate.currentrows);                                                     ^^

in second 1 need use

dgtest2.itemssource = new dataview(dttest1, "typeid = 25", "", dataviewrowstate.currentrows);

the syntax used rowfilter parameter in dataview constructor same used property expression of datacolumn , not equality operator of c#

edit following comment below. if typeid database field of text datatype need enclose value used in rowfilter between single quotes 

dgtest1.itemssource = new dataview(dttest1, "typeid <> '25'", "", dataviewrowstate.currentrows); dgtest2.itemssource = new dataview(dttest1, "typeid = '25'", "", dataviewrowstate.currentrows);

however seems little strange. if typeid field contains numbers should defined numeric datatype.


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