How can I force input to uppercase in an ASP NET textbox

Question

I m writing an ASP NET application  I have a textbox on a webform  and I want to force whatever the user types to upper case  I d like to do this on the front end  You should also note that there is a validation control on this textbox  so I want to make sure the solution doesn t interfere with the ASP NET validation   Clarification  It appears that the CSS text transform makes the user input appear in uppercase  However  under the hood  it s still lower case as the validation control fails  You see  my validation control checks to see if a valid state code is entered  however the regular expression I m using only works with uppercase characters

User · Answer

Set the style on the textbox as text-transform  uppercase

User · Answer

CSS could be of help here   style  text-transform  uppercase      does this help

User · Answer

You can intercept the key press events  cancel the lowercase ones  and append their uppercase versions to the input   window onload   function          var input   document getElementById  test         input onkeypress   function                 So that things work both on Firefox and Internet Explorer          var evt   arguments 0     event          var char   String fromCharCode evt which    evt keyCode               Is it a lowercase character          if    a-z   test char                    Append its uppercase version             input value    char toUpperCase                    Cancel the original event             evt cancelBubble   true              return false                       This works in both Firefox and Internet Explorer  You can see it in action here

User · Answer

I use a simple one inline statement   lt asp TextBox ID  txtLocatorName  runat  server   style  text-transform uppercase  CssClass  textbox     TabIndex  1  gt   lt  asp TextBox gt    If you don t want to use css classes you can just use inline style statement  This one just visibly make uppercase      On Server side use  string UCstring   txtName Text ToUpper

User · Answer

Set the style on the textbox as text-transform  uppercase

User · Answer

I just did something similar today   Here is the modified version    lt asp TextBox ID  txtInput  runat  server  gt  lt  asp TextBox gt   lt script type  text javascript  gt      function setFormat             var inp   document getElementById  ctl00 MainContent txtInput            var x   inp value          inp value   x toUpperCase               var inp   document getElementById  ctl00 MainContent txtInput        inp onblur   function evt            setFormat            lt  script gt    Basically  the script attaches an event that fires when the text box loses focus

User · Answer

style  text-transform uppercase

User · Answer

I use a simple one inline statement   lt asp TextBox ID  txtLocatorName  runat  server   style  text-transform uppercase  CssClass  textbox     TabIndex  1  gt   lt  asp TextBox gt    If you don t want to use css classes you can just use inline style statement  This one just visibly make uppercase      On Server side use  string UCstring   txtName Text ToUpper

User · Answer

Why not use a combination of the CSS and backend  Use   style  text-transform uppercase     on the TextBox  and in your codebehind use   Textbox Value ToUpper      You can also easily change your regex on the validator to use lowercase and uppercase letters  That s probably the easier solution than forcing uppercase on them

User · Answer

CSS could be of help here   style  text-transform  uppercase      does this help

User · Answer

lt  -- Script by hscripts com -- gt   lt script language javascript gt      function upper ustr                var str ustr value          ustr value str toUpperCase               function lower ustr                var str ustr value          ustr value str toLowerCase           lt  script gt    lt form gt      Type Lower-case Letters lt textarea name  address  onkeyup  upper this   gt  lt  textarea gt   lt  form gt    lt form gt      Type Upper-case Letters lt textarea name  address  onkeyup  lower this   gt  lt  textarea gt   lt  form gt

User · Answer

Use a CSS style on the text box  Your CSS should be something like this    uppercase       text-transform  uppercase      lt asp TextBox ID  TextBox1  runat  server  Text    CssClass  uppercase  gt  lt  asp TextBox gt

User · Answer

lt telerik RadTextBox ID  txtCityName  runat  server  MaxLength  50  Width  200px                              Style  text-transform  uppercase   gt

User · Answer

Use the text-transform CSS for the front-end and then use the toUpper method on your string server-side before you validate

User · Answer

Why not use a combination of the CSS and backend  Use   style  text-transform uppercase     on the TextBox  and in your codebehind use   Textbox Value ToUpper      You can also easily change your regex on the validator to use lowercase and uppercase letters  That s probably the easier solution than forcing uppercase on them

User · Answer

JavaScript has the  toUpperCase    function of a string   So  something along these lines   function makeUpperCase this        this value   this value toUpperCase

User · Answer

I would do this using jQuery    lt script src  Scripts jquery-1 3 2 js  type  text javascript  gt  lt  script gt   lt script type  text javascript  gt        document  ready function                 txt   keydown function e                if  e keyCode  gt   65  amp  e keyCode  lt   90                    val1       txt   val                        txt   val val1   String fromCharCode e keyCode                    return false                                     lt  script gt    You must have the jQuery library in the  script folder

User · Answer

lt telerik RadTextBox ID  txtCityName  runat  server  MaxLength  50  Width  200px                              Style  text-transform  uppercase   gt

User · Answer

Set the style on the textbox as text-transform  uppercase

User · Answer

text-transform   CSS property specifies how to capitalize an element s text  It can be used to make text appear in all-uppercase or all-lowercase  CssClass  WebControl CssClass Property  you can learn more about it - https   developer mozilla org en docs Web CSS text-transform  https   msdn microsoft com en-us library system web ui webcontrols webcontrol cssclass v vs 110  aspx    use Style  text-transform  uppercase   or CssClass  upper

User · Answer

I would do like   lt asp TextBox ID  txtName  onkeyup  this value this value toUpperCase    runat  server  gt  lt  asp TextBox gt

User · Answer

I have done some analysis about this issue on four popular browser versions    the style tag simple displays the characters in uppercase but  the control value still remains as lowercase the keypress functionality using the char code displayed above is a bit worry some as in firefox chrome and safari it disables the feature to Ctrl   V into the control  the other issue with using character level to upper case is also not translating the whole string to upper case  the answer I found is to implement this on keyup in conjunction with the style tag    lt -- form name  frmTest  -- gt   lt -- input type  text  size 100 class  ucasetext  name  textBoxUCase  id  textBoxUCase  -- gt   lt --  form -- gt   window onload   function         var input   document frmTest textBoxUCase      input onkeyup   function             input value   input value toUpperCase

User · Answer

JavaScript has the  toUpperCase    function of a string   So  something along these lines   function makeUpperCase this        this value   this value toUpperCase

User · Answer

Use a CSS style on the text box  Your CSS should be something like this    uppercase       text-transform  uppercase      lt asp TextBox ID  TextBox1  runat  server  Text    CssClass  uppercase  gt  lt  asp TextBox gt

User · Answer

Set the style on the textbox as text-transform  uppercase

User · Answer

I just did something similar today   Here is the modified version    lt asp TextBox ID  txtInput  runat  server  gt  lt  asp TextBox gt   lt script type  text javascript  gt      function setFormat             var inp   document getElementById  ctl00 MainContent txtInput            var x   inp value          inp value   x toUpperCase               var inp   document getElementById  ctl00 MainContent txtInput        inp onblur   function evt            setFormat            lt  script gt    Basically  the script attaches an event that fires when the text box loses focus

User · Answer

I have done some analysis about this issue on four popular browser versions    the style tag simple displays the characters in uppercase but  the control value still remains as lowercase the keypress functionality using the char code displayed above is a bit worry some as in firefox chrome and safari it disables the feature to Ctrl   V into the control  the other issue with using character level to upper case is also not translating the whole string to upper case  the answer I found is to implement this on keyup in conjunction with the style tag    lt -- form name  frmTest  -- gt   lt -- input type  text  size 100 class  ucasetext  name  textBoxUCase  id  textBoxUCase  -- gt   lt --  form -- gt   window onload   function         var input   document frmTest textBoxUCase      input onkeyup   function             input value   input value toUpperCase

User · Answer

You can intercept the key press events  cancel the lowercase ones  and append their uppercase versions to the input   window onload   function          var input   document getElementById  test         input onkeypress   function                 So that things work both on Firefox and Internet Explorer          var evt   arguments 0     event          var char   String fromCharCode evt which    evt keyCode               Is it a lowercase character          if    a-z   test char                    Append its uppercase version             input value    char toUpperCase                    Cancel the original event             evt cancelBubble   true              return false                       This works in both Firefox and Internet Explorer  You can see it in action here

User · Answer

Why not use a combination of the CSS and backend  Use   style  text-transform uppercase     on the TextBox  and in your codebehind use   Textbox Value ToUpper      You can also easily change your regex on the validator to use lowercase and uppercase letters  That s probably the easier solution than forcing uppercase on them

User · Answer

I just did something similar today   Here is the modified version    lt asp TextBox ID  txtInput  runat  server  gt  lt  asp TextBox gt   lt script type  text javascript  gt      function setFormat             var inp   document getElementById  ctl00 MainContent txtInput            var x   inp value          inp value   x toUpperCase               var inp   document getElementById  ctl00 MainContent txtInput        inp onblur   function evt            setFormat            lt  script gt    Basically  the script attaches an event that fires when the text box loses focus

User · Answer

ready docReady         function docReady                      myTextbox   focusout uCaseMe                function uCaseMe                  var val     this  val   toUpperCase                    Reset the current value to the Upper Case Value               this  val val               This is a reusable approach  Any number of textboxes can be done this way w o naming them   A page wide solution could be achieved by changing the selector in docReady   My example uses lost focus  the question did not specify as they type  You could trigger on change if thats important in your scenario

User · Answer

CSS could be of help here   style  text-transform  uppercase      does this help

User · Answer

I would do like   lt asp TextBox ID  txtName  onkeyup  this value this value toUpperCase    runat  server  gt  lt  asp TextBox gt

User · Answer

JavaScript has the  toUpperCase    function of a string   So  something along these lines   function makeUpperCase this        this value   this value toUpperCase

User · Answer

I would do this using jQuery    lt script src  Scripts jquery-1 3 2 js  type  text javascript  gt  lt  script gt   lt script type  text javascript  gt        document  ready function                 txt   keydown function e                if  e keyCode  gt   65  amp  e keyCode  lt   90                    val1       txt   val                        txt   val val1   String fromCharCode e keyCode                    return false                                     lt  script gt    You must have the jQuery library in the  script folder

User · Answer

Use a CSS style on the text box  Your CSS should be something like this    uppercase       text-transform  uppercase      lt asp TextBox ID  TextBox1  runat  server  Text    CssClass  uppercase  gt  lt  asp TextBox gt

User · Answer

Use the text-transform CSS for the front-end and then use the toUpper method on your string server-side before you validate

User · Answer

JavaScript has the  toUpperCase    function of a string   So  something along these lines   function makeUpperCase this        this value   this value toUpperCase

User · Answer

Okay  after testing  here is a better  cleaner solution         FirstName   bind  keyup   function              Get the current value of the contents within the text box     var val       FirstName   val   toUpperCase            Reset the current value to the Upper Case Value         FirstName   val val

User · Answer

Use the text-transform CSS for the front-end and then use the toUpper method on your string server-side before you validate

User · Answer

You can intercept the key press events  cancel the lowercase ones  and append their uppercase versions to the input   window onload   function          var input   document getElementById  test         input onkeypress   function                 So that things work both on Firefox and Internet Explorer          var evt   arguments 0     event          var char   String fromCharCode evt which    evt keyCode               Is it a lowercase character          if    a-z   test char                    Append its uppercase version             input value    char toUpperCase                    Cancel the original event             evt cancelBubble   true              return false                       This works in both Firefox and Internet Explorer  You can see it in action here

User · Answer

text-transform   CSS property specifies how to capitalize an element s text  It can be used to make text appear in all-uppercase or all-lowercase  CssClass  WebControl CssClass Property  you can learn more about it - https   developer mozilla org en docs Web CSS text-transform  https   msdn microsoft com en-us library system web ui webcontrols webcontrol cssclass v vs 110  aspx    use Style  text-transform  uppercase   or CssClass  upper

User · Answer

Okay  after testing  here is a better  cleaner solution         FirstName   bind  keyup   function              Get the current value of the contents within the text box     var val       FirstName   val   toUpperCase            Reset the current value to the Upper Case Value         FirstName   val val

User · Answer

I realize it is a bit late  but I couldn t find a good answer that worked with ASP NET AJAX  so I fixed the code above   function ToUpper                So that things work both on FF and IE         var evt   arguments 0     event          var char   String fromCharCode evt which    evt keyCode               Is it a lowercase character          if    a-z   test char                    convert to uppercase version             if  evt which                    evt which   char toUpperCase   charCodeAt 0                             else                   evt keyCode   char toUpperCase   charCodeAt 0                                    return true          Used like so           lt asp TextBox ID  txtAddManager  onKeyPress  ToUpper    runat  server                Width  84px  Font-Names  Courier New  gt  lt  asp TextBox gt

User · Answer

here is a solution that worked for me   http   plugins jquery com project bestupper  You have to get the JavaScript from http   plugins jquery com files jquery bestupper min js txt and there you go    Works like a charm

User · Answer

Use a CSS style on the text box  Your CSS should be something like this    uppercase       text-transform  uppercase      lt asp TextBox ID  TextBox1  runat  server  Text    CssClass  uppercase  gt  lt  asp TextBox gt

User · Answer

CSS could be of help here   style  text-transform  uppercase      does this help

User · Answer

style  text-transform uppercase

User · Answer

I just did something similar today   Here is the modified version    lt asp TextBox ID  txtInput  runat  server  gt  lt  asp TextBox gt   lt script type  text javascript  gt      function setFormat             var inp   document getElementById  ctl00 MainContent txtInput            var x   inp value          inp value   x toUpperCase               var inp   document getElementById  ctl00 MainContent txtInput        inp onblur   function evt            setFormat            lt  script gt    Basically  the script attaches an event that fires when the text box loses focus

User · Answer

You can intercept the key press events  cancel the lowercase ones  and append their uppercase versions to the input   window onload   function          var input   document getElementById  test         input onkeypress   function                 So that things work both on Firefox and Internet Explorer          var evt   arguments 0     event          var char   String fromCharCode evt which    evt keyCode               Is it a lowercase character          if    a-z   test char                    Append its uppercase version             input value    char toUpperCase                    Cancel the original event             evt cancelBubble   true              return false                       This works in both Firefox and Internet Explorer  You can see it in action here

User · Answer

I realize it is a bit late  but I couldn t find a good answer that worked with ASP NET AJAX  so I fixed the code above   function ToUpper                So that things work both on FF and IE         var evt   arguments 0     event          var char   String fromCharCode evt which    evt keyCode               Is it a lowercase character          if    a-z   test char                    convert to uppercase version             if  evt which                    evt which   char toUpperCase   charCodeAt 0                             else                   evt keyCode   char toUpperCase   charCodeAt 0                                    return true          Used like so           lt asp TextBox ID  txtAddManager  onKeyPress  ToUpper    runat  server                Width  84px  Font-Names  Courier New  gt  lt  asp TextBox gt

User · Answer

Use the text-transform CSS for the front-end and then use the toUpper method on your string server-side before you validate

User · Answer

lt  -- Script by hscripts com -- gt   lt script language javascript gt      function upper ustr                var str ustr value          ustr value str toUpperCase               function lower ustr                var str ustr value          ustr value str toLowerCase           lt  script gt    lt form gt      Type Lower-case Letters lt textarea name  address  onkeyup  upper this   gt  lt  textarea gt   lt  form gt    lt form gt      Type Upper-case Letters lt textarea name  address  onkeyup  lower this   gt  lt  textarea gt   lt  form gt

User · Answer

style  text-transform uppercase

User · Answer

ready docReady         function docReady                      myTextbox   focusout uCaseMe                function uCaseMe                  var val     this  val   toUpperCase                    Reset the current value to the Upper Case Value               this  val val               This is a reusable approach  Any number of textboxes can be done this way w o naming them   A page wide solution could be achieved by changing the selector in docReady   My example uses lost focus  the question did not specify as they type  You could trigger on change if thats important in your scenario

User · Answer

style  text-transform uppercase

User · Answer

Why not use a combination of the CSS and backend  Use   style  text-transform uppercase     on the TextBox  and in your codebehind use   Textbox Value ToUpper      You can also easily change your regex on the validator to use lowercase and uppercase letters  That s probably the easier solution than forcing uppercase on them

User · Answer

here is a solution that worked for me   http   plugins jquery com project bestupper  You have to get the JavaScript from http   plugins jquery com files jquery bestupper min js txt and there you go    Works like a charm

[javascript] How can I force input to uppercase in an ASP.NET textbox?

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