Skip to main content

Max Length not working for Multi Line Text Box : Solution

In almost all the web projects, we require a multiline TextBox control. It was annoying to find that maxLength property doesn't work on multiline textboxes. There is a workaround to accomplish this using RegularExpressionValidator. Following is the markup that will restrict the text box to maximum of 500 characters.





  






OR You it can be done so easily using javascript functions.



I suggest that we should put a javascript validator function so that user will not be able to enter characters more than the length specified, even cant paste any text with more than specified characters. Here are those javascript functions.



TextBox Control
                                                                                                                                          
                                                                                                                                    





Javascript:



// Keep user from entering more than maxLength characters

function doKeypress(control){
    maxLength = control.attributes["maxLength"].value;
    value = control.value;
     if(maxLength && value.length > maxLength-1){
          event.returnValue = false;
          maxLength = parseInt(maxLength);
     }
}




// Cancel default behavior

function doBeforePaste(control){
    maxLength = control.attributes["maxLength"].value;
     if(maxLength)
     {
          event.returnValue = false;
     }
}





// Cancel default behavior and create a new paste routine

function doPaste(control){
    maxLength = control.attributes["maxLength"].value;
    value = control.value;
     if(maxLength){
          event.returnValue = false;
          maxLength = parseInt(maxLength);
          var oTR = control.document.selection.createRange();
          var iInsertLength = maxLength - value.length + oTR.text.length;
          var sData = window.clipboardData.getData("Text").substr(0,iInsertLength);
          oTR.text = sData;
     }
}





One additional thing you have to do is to add maxLength property of text box on Server side Page Load.



protected void Page_Load(object sender, EventArgs e)
    {
txtBox.Attributes.Add("maxLength", txtBox.MaxLength.ToString());
           
}




Hope this will help you.


The Girl Who Played with FireI Love The WayPride Professional Pro Length Max 4" Golf Tees WhiteLaugh With Max Linder

Comments

Post a Comment

Popular posts from this blog

Call User-defined Function on Linked Server :SQL Server

If you try to invoke a user-defined function (UDF) through a linked server in SQL Server by using a "four-part naming" convention (server.database.dbo.Function), you may receive error message. 
The reason is User-defined function calls inside a four-part linked server query are not supported in SQL Server. Thats why error message indicates that the syntax of a Transact-SQL statement is incorrect. 
To work around this problem, use the Openquery function instead of the four-part naming convention. For example, instead of the following query
Select * from Linked_Server.database.dbo.Function(10)
run a query with the Openquery function:
Select * from Openquery(Linked_Server,'select database.dbo.Function(10)') If the user-defined function takes variable or scalar parameters, you can use the sp_executesql stored procedure to avoid this behavior.  For example:
exec Linked_Server.database.dbo.sp_executesql N'SELECT database.dbo.Function(@input)',N'@input int',@inp…

Microsoft SQL Server 2005 Service Pack 3 for Windows 7 (64 bit)

You can download from here

Microsoft SQL Server 2005 Service Pack 3
OverviewService Pack 3 for Microsoft SQL Server 2005 is now available. SQL Server 2005 service packs are cumulative, and this service pack upgrades all service levels of SQL Server 2005 to SP3. You can use these packages to upgrade any of the following SQL Server 2005 editions:
Enterprise Enterprise Evaluation Developer Standard Workgroup

Download Size:
326.0 MB
http://www.microsoft.com/downloads/details.aspx?FamilyID=ae7387c3-348c-4faa-8ae5-949fdfbe59c4&displaylang=en


Microsoft SQL Server Management Studio Express Service Pack 3
OverviewMicrosoft SQL Server Management Studio Express (SSMSE) is a free, easy-to-use graphical management tool for managing SQL Server 2005 Express Edition and SQL Server 2005 Express Edition with Advanced Services. SSMSE can also manage instances of the SQL Server Database Engine created by any edition of SQL Server 2005.

Note: SSMSE cannot manage SQL Server Analysis Services, In…

Pass multiple complex objects to Web API action

Working with ASP.NET Web API, the most unexpected thing is the limited support of POST data values to simple ApiController methods.

When a parameter has [FromBody], Web API uses the Content-Type header to select a formatter. At most one parameter is allowed to read from the message body. The reason for this rule is that the request body might be stored in a non-buffered stream that can only be read once.

A simple principle, you can send any content in HTTP request, it only need to be serializable into a string. So, it could be multiple JSON object. In this example, the content type is "application/json" and the request body is a raw JSON string (not a JSON object).

Here I found a workaround to pass multiple complex objects (using the above principle) from jquery to a WEB API using JObject, and then cast back to your required specific object type in api controller. This objects provides a concrete type specifically designed for working with JSON.

var customer = { "Name&q…