ASP.NET c# error 404.15 when submitting a form -

i have created form in asp.net webforms every time try , submit form following error.

the length of query string request exceeds configured maxquerystringlength value.

i have tried increasing value cannot seem submit.

this query string form creating

http://localhost:3819/accidentreportform.aspx?__eventtarget=&__eventargument=&__viewstate=%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%2fbojqb3b%2fc%2fskj3kkzh9h0c%3d&__eventvalidation=%2fwedajsbhiaiwf9douddxwyjr2pujwwozw%2fvgw%2btopxdezd442zuirpanrt73r7v%2fsdtxgtfl6uidb0ntnhywmikhwllgxurpe%2blhpjj2kpifony98nntzlreh4zdukwhzavf0h6673reckl6temjgqvuvviqhvytdkj4uixk35y4kxrfwoz%2bdslskwo%2b%2fovx4deb6dxp1p%2bvd1jda%2bko6blpg9jzetnkzg2nmnykgeuvpkr%2bt%2flc3778xmzz0nw2xldw3q%2bd4liz3bfmm%2b9jqbvupkatbje7jd57snodx0arwht5qs9iwhn6ccy9vpwcdlsagyd5hvo87jmnmbtnyes%2bcfoffptth2%2fohcioc7hlcfv6yuhufdwckyxb2pwpnknz475lj4xmylkv2egajcyfgc9rf6%2fdbxmn%2f8s7sstvjsf1pb%2b3jpztah7zklwqld11xoxv3xt1rum2bziol0t2niba7ducqddewuj50zocacwvwfehmsu%2bmso1jvhrablrrdcez0c5su%2bnn955rtbtkl946cwxkdv9a7qb0esi41hiqj4iyc9bqiznpk2xof2fc%2bvq6cuz3upj%2bxyku%2bqtpp4is0gdu4fglyzvctfvvqc4gvyl0nm6bsssxjzoz8f%2bertdje9ygul5pxfddhnksgw6qeuac0ovtow3dloxwkhxgg4jw8f3qcmpuhqkzyorpng8byeqoo9estst6b7a1fu2ebpn3rmgjs2xiyu51uimp8yyul2tpza2vxbzhutbj%2fcb7ic2eefubz6zx4pisgbur1n7fpxb3aqn7xasa8ffphdkmyem0in8xuf5rhgmw7%2byc4u3h0apfst9l5nwczm3lyvijbsgez5xdbpgxu5tlpsddtdeps1v3eqmmci%2fbtnckzah%2b5dopgqyds0%2bhocrupki2peturitc5ya%2bbias9%2biptoyv2yhe89bcdgot3tui27amggbkm6zestjpyqlqeb%2flbiqg3p86zgggf3x2%2bdd1bj%2bcevwzqxxnredtp1zbdf5zjhzbymg%2fghrltobhob9vwjbwuyosobjg5zozh7swre07%2bifzeel8va%2flrtwpcjcbm67ymb%2b540kdre7ehvzi8rvuil4zxcztppelcnellujvvex%2birzvd%2fl%2b%2brcg3otp0pq9ruxuffch%2byj1%2fo6oy2jfb2h%2btq0af7wjpd77fywbjui02vsuzum4a92xo4oybmvlrednm2ynzswphuzk6hlp%2bkoywqh21coaqpcsavf0qtna2bykmxxjgeg8gsxcqtlxzicqxbo4wblxjuoovy7dwzexe2f2obxjioe4r5iwx9io2cgr15bcsk0njy%2fwoozejjhcou2io0wiz3bhq3%2b%2fz%2fjzw5o1efbeexejw3h2eymhf9lutp%2fi7ryxwlh6hczgoxmplm9nnto1zwfabjd9dbsu%2bnw5h2znmyktmew0mmm1cgkrdmwwcc7yeowrfsc240sm4eirmna9xuctkiw97ermrzryerr1zmyqg2%2fpxri7is8qucfgzboj%2by5%2f8tamp%2f4iiqtu26nceaymm1mfpdc%2bukttvtfhtpgyv5z%2btb2ghhc5miisnx%2fzlcadw7qoqolbw86att%2bpxkruvje%2ft8tpqkuoxy0jpnadfsfihubi4jeuzjls8yyjrbpnscwnr0zwnmhmj9mez0jd9bcdd9so14bw6uvx4h9ts%2ffawvtdgyzni0eorwprpjxtop3rcmi04wbd7qm9xzvzshiqvnzss5vjqrbgef%2fdhjb0nlijnccyjmtwvp%2ffp10%2byrjvtucfmyqntrhhefb64%2b3bb8amkskf4xl2hh0hr4cc24yp9nqmpdaeerucc23mlwvvkhqlgugqvgjgx2%2bpf1xmi%2bkftjc5sol25alaptniorpuhu3z4jipqme1i1lcnikrjsacl7ybrktlzxl68s6rm%2f4%2fhh29mulmpfb9cc5oapetnxfrfwe0dl8x0tfbd5e%2bw42an%2bb8wxycza66nkhdtzyxmhe9qo3zeb0dl6isprrvcd5gbqzxxdhxw9ejijgqthb4kbbgx5zcychyopfxmeyi389habq42ztyvpxqsh5eyepaxvhmd%2bvfktri%2fuprd9rjfxm3wt5kpnsp8p6x%2bxrojfjbvgemp7caynvm7xztzw9ne2huqciankbw8hzdveuqgzklvzzoipoht1nsam077mktge2ggu0iyy6z%2bzvx7h3pecskahpj2vjolzta%2by1d60uhp29uoflvclnzlicwlp8cev%2bjywxnoplvqpetvoae5nxgfah7kyhfcxyetvvidaxiqmrchr6yvkfscm39ciiadep4w7k0yru%2bbpgpnmqh4ylkcvorhlwwqae3qdwponkjm2xe3uhgv6lk5a8m72ox5atg1a4ee3drcxgnijntpsw1umwfwrpczq9o%2f9jdxpxa1q1wnrmek%2bobr1hafc5wih%2bhkayy10dxie8g1cpftt7zfidol%2flraropxt%2b8pt%2fhhu83apje9hef%2bbvyf69veop3j3oo8ttuawdqjmlf1f%2bn%2bmafjgtwt3uqvhxyk3vrn0hfzvpow%2fhyhxdwywenrkk4ouwi4m7dl8gqcfnvj4ryc%2bjxodzxe5iy%2bgszfxjby5cjemhabpmucnncq0ksfoqmfjp2jqz%2fwwzuye5nhfb1iceon7ek9j4ggps5%2f4qvlpnvsd5wo50ttbe8cjuyy7ywrl5hn%2fdhpar1kqqk%2bzsychxpiqxmi%2btabp5f%2br3x%2bgonngr9iccnqwpek0km3gfpkp%2blwqrxdgtwa%2bxgf6vriisg4pmbogp1wqtn0jd53mhorjr4bpxk6r%2bywfglbxecmgehgzwip9ahdxenqqqr2xkru4bp2slxvw8yajvizt4xp34e4wpkvens9c%2ba8ed6i7nbq08wmgcgw%2blux6zzpex5e2xeuu7n5yvbzeyrlntdzatukib3eqcah7g4zx5yrckjvgkl0yhle5dmikduvi38bzd2dbvm1outq02sq9s1wt%2b0vzrpo98js4i4jjunqzxyfphrtfuoft%2blpgrttdkbsopo2anqoglnu42ateoboyrjncfyq%2b5ikzjimpazvgrvvmvffyei%2fjqklvjptn0bvi939tauu1vywl%2fvzjemltulvt8vh19zeh015jv4bdig1v%2fpfzhlr82kvvd%2fs%2b%2ffahywg33a60hsbv1lvwxx0phikghwlzjdwif1bne82urw5wdrub6a4pb5aoeu6lydksu43twdldkeuvbs%2bayow7t%2baoqlj%2brpluctarnafrguwssefw%2f3o5dqj%2b2tyzaxi%2b0udxfuxy%2bczpj7afwq%3d%3d&ctl00%24contentplaceholder1%24completebyinj=on&ctl00%24contentplaceholder1%24colname=fgh+fgh&ctl00%24contentplaceholder1%24hnumber=78&ctl00%24contentplaceholder1%24street=jk&ctl00%24contentplaceholder1%24town=hjk&ctl00%24contentplaceholder1%24county=hjk&ctl00%24contentplaceholder1%24postcode=hjk&ctl00%24contentplaceholder1%24jobtitle=hjk&ctl00%24contentplaceholder1%24dd=1&ctl00%24contentplaceholder1%24mm=1&ctl00%24contentplaceholder1%24yy=2012&ctl00%24contentplaceholder1%24hh=0&ctl00%24contentplaceholder1%24mmm=0&ctl00%24contentplaceholder1%24acclocation=hk&ctl00%24contentplaceholder1%24accequipment=hjk&ctl00%24contentplaceholder1%24accdetails=hjk&ctl00%24contentplaceholder1%24accrecommendations=hjk&submittimedate=%40datetime.now&ctl00%24contentplaceholder1%24button1=submit 

your form submitted means set in location restricted ## chars..

in order submit longer data: use <form method="post">