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This article mainly introduces "how to solve the problem of registering Javascript in asp.net custom controls". In daily operation, I believe many people have doubts about how to solve the problem of registering Javascript in asp.net custom controls. Xiaobian consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the questions of "how to solve the problem of registering Javascript in asp.net custom controls". Next, please follow the editor to study!

The copy code is as follows:

Protected override void OnPreRender (EventArgs e)

{

Base.OnPreRender (e)

RenderJS ()

}

Private void RenderJS ()

{

If (! Page.ClientScript.IsClientScriptBlockRegistered (SCRIPT_ID)) / / if you don't already have a registration statement, register

{

Page.ClientScript.RegisterClientScriptBlock (this.GetType (), SCRIPT_ID,SCRIPT_CONTENT)

}

}

Private const string SCRIPT_ID = "5B7A061B93D546A7A2601D56A8738DB9"; / / Custom identity Guid

Private const string SCRIPT_CONTENT = "\ nvar CB4949501DA_checkDouble = function (data) {\ nvar key = event.keyCode;\ nif ((key)

< 48 || key >

57) & & key! = 46 & & key! = 45) {\ nreturn false;\ n}\ nelse {\ nif (key = = 46) {\ nif (data.indexOf (\ ".\")! =-1 | | data.length = = 0)\ nreturn false;\ n}\ nelse if (key = = 45) {\ nif (data.indexOf (\ "-\")! =-1 | | data.length! = 0) {\ nreturn false;\ n}\ nreturn true \ n}\ nvar CB4949501DA_checkInt = function (data) {\ nvar key = event.keyCode;\ n\ nif ((key)

< 48 || key >

57) & & key! = 45) {\ nreturn false;\ n}\ nelse {\ nif (key = = 45) {\ nif (data.indexOf (\ "-\")! =-1 | | data.length! = 0) {\ nreturn false;\ n}\ n}\ nelse {\ nvar input = String.fromCharCode (key)\ nvar intData = parseInt (data + input);\ nif (intData > 2147483647 | | intData

< -2147483648) {\nreturn false;\n}\n}\nreturn true;\n}\nreturn true;\n}\nvar CB4949501DA_checkLong = function (data) {\nvar key = event.keyCode;\n\nif ((key < 48 || key >

57) & & key! = 45) {\ nreturn false;\ n}\ nelse {\ nif (key = = 45) {\ nif (data.indexOf (\ "-\")! =-1 | | data.length! = 0) {\ nreturn false;\ n}\ n}\ nelse {\ nvar input = String.fromCharCode (key)\ nvar longstrData = data + input\ nif (longstrData.length > 19) {\ nreturn false;\ n}\ n}\ nreturn true;\ n}\ n\ n "

Then add the code to call the written javascript function:

The copy code is as follows:

Protected override void AddAttributesToRender (System.Web.UI.HtmlTextWriter writer)

{

Base.AddAttributesToRender (writer)

Writer.AddAttribute ("onkeypress", "return CB4949501DA_checkLong (this.value);");}

In addition, the reference file looks like this.

The copy code is as follows:

If (! Page.ClientScript.IsClientScriptIncludeRegistered ("reference js File 1") / / if it is not already referenced, then reference

{

Page.ClientScript.RegisterClientScriptInclude ("reference js File 1", "JS/MYJS.JS")

}

The view of the source code for the generated page is as follows:

The copy code is as follows:

Var CB4949501DA_checkDouble = function (data) {

Var key = event.keyCode

If ((key

< 48 || key >

57) & & key! = 46 & & key! = 45) {

Return false

}

Else {

If (key = = 46) {

If (data.indexOf (".")! =-1 | | data.length = = 0)

Return false

}

Else if (key = = 45) {

If (data.indexOf ("-")! =-1 | | data.length! = 0) {

Return false

}

}

}

Return true

}

Var CB4949501DA_checkInt = function (data) {

Var key = event.keyCode

If ((key

< 48 || key >

57) & & key! = 45) {

Return false

}

Else {

If (key = = 45) {

If (data.indexOf ("-")! =-1 | | data.length! = 0) {

Return false

}

}

Else {

Var input = String.fromCharCode (key)

Var intData = parseInt (data + input)

If (intData > 2147483647 | | intData

< -2147483648) { return false; } } return true; } return true; } var CB4949501DA_checkLong = function (data) { var key = event.keyCode; if ((key < 48 || key >

57) & & key! = 45) {

Return false

}

Else {

If (key = = 45) {

If (data.indexOf ("-")! =-1 | | data.length! = 0) {

Return false

}

}

Else {

Var input = String.fromCharCode (key)

Var longstrData = data + input

If (longstrData.length > 19) {

Return false

}

}

}

Return true

}

At this point, the study on "how to solve the problem of registering Javascript in asp.net custom controls" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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