adding textbox dynamically in struts

[Vikas Ramnani]

Hello,
I saw similar queries have been asked in other topics, But even after reading that I could not lend up with a proper solution. So I am posting it in new thread.
Here is what I want to do, I want to have a Add button in my JSP which on click generate a textbox. This completely depends on user how many times he clicks on the Add button.
I have successfully implemented the java script part, But I am not sure How can I retrieve the information in those textboxes in my Struts action.

I have tried giving dynamically generated textboxes same name. I defined an ArrayList with the same name and getter, setter methods with that name in my Form Bean. But it didn't work.
Could anybody please tell me :
1. What kind of name should I give to the dynamically added textboxes ?
2. What kind of field should I define in my Form Bean to retrieve the information ?
3. What should be my getter setter methods for that particular field ?

Thank you very much in advance.

Best,
Vikas

[Joe Ess]

have a look indexed properties.

[Vikas Ramnani]

Hi,
Thanks for replying.
I already read that link following that I made a skeleton which I am posting here

MY Java Script

    
var count = 1;
function addRowToTable(){
	  var newField1 = document.createTextNode("goroco"+count);
	  var newCell1 = document.createElement("td");
	  newCell1.appendChild(newField1);
	  
	  var newField = document.createElement("input");
	  newField.type = "text";
	  newField.name = "versionArray[" + count + "]";
	  var newCell = document.createElement("td");
	  newCell.appendChild(newField);	
	  
	  var newRow = document.createElement("tr");
	  newRow.appendChild(newCell1);
	  newRow.appendChild(newCell);
	  
	  var theTable = document.getElementById("tableProject");
	  theTable.appendChild(newRow);
	  count++;
	}

My relevant Form part

private String[] versionArray;


public void setVersionArray(int index, String version) {
		this.versionArray[index]= version;
	}


public String getVersionArray(int index) {
		return versionArray[index];
	}

In my Action I am using

form.getVersionArray(1);

Where form is instance of my Form Bean. But I am getting exception when I submit this form, I am new to struts I might have missed some details in that article, But I am kind of stuck. Please guide me where I am doing the mistake.

Best,
Vikas

JCE: Please UseCodeTags

[Joe Ess]

Vikas Ramnani wrote:Hi,
But I am getting exception when I submit this form, I am new to struts I might have missed some details in that article, But I am kind of stuck. Please guide me where I am doing the mistake.

What is the exception you are getting? Remember, the better question you ask, the better help we can be.

[Vikas Ramnani]

I am getting NullPointerException on method setVersionArray.

[Joe Ess]

That makes sense. I don't see you creating an array anywhere.

[Vikas Ramnani]

Oh yes my bad !
I got it working.
Thank you very much for your help.

Vikas

[Joe Ess]

[Supraja Araveeti]

can you please tell me where you have declared version Array.I am also getting the same null pointer exception.

This is my javascript code

var counter=0;

var cellThird = row.insertCell(2);
var e1 = document.createElement('input');
e1.type = 'text';
e1.name = "cnsIDArray["+counter+"]";

public String getCnsIDArray(int index)
{
return cnsIDArray[index];
}

public void setCnsIDArray(int index,String cnsID)
{
cnsIDArray[index] = cnsID; //Here I am getting exception
}

I am accessing the value in this way

needForm.getCnsIDArray(0)


please help me