c# - Verifing if text already exists -


i have sql table saves word , need check if word exists , so, should message saying word exists. possible? if how should it? leave down below myccode add word sql, if need else provide without problem.

string conn = configurationmanager.connectionstrings["test"].connectionstring;  using (sqlconnection sqlconn = new sqlconnection(conn))   {    sqlconn.open();    string sqlquery = @"insert testetiposdestados(cdu_estados) values(@estados)";    sqlcommand sqlcm = new sqlcommand();    sqlcm.connection = sqlconn;    sqlcm.commandtext = sqlquery;    sqlcm.commandtype = commandtype.text;    sqlcm.parameters.addwithvalue("@estados", textbox1.text);    sqlcm.executenonquery();    sqlconn.close(); }

i'm using c#

you can use if not exist statment 

if not exists (select * testetiposdestados     cdu_estados = @estados) begin    insert testetiposdestados(cdu_estados) values(@estados) end

your query become: 

string sqlquery =    @"if not exists(select *                      testetiposdestados                     cdu_estados = @estados)      begin        insert testetiposdestados(cdu_estados)             values (@estados)      end";

if inserted means not present in table already.


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