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How to get my dynamic generated controls value in asp.net C#

I have gone through many articles and similar kind of stack over flow questions. Almost I spend more than a day trying to find the solution, all goes in vain.
First I should tell you what I am trying to make.
There a simple grid having a text box currently
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So when I put some value to text box it generate these text boxes and checkbox within that row.(image related to above description)
There are events firing when text box value get changed , second when add new row is clicked.(Currently ignore delete button event).
What I earlier planned was like this, create controls in every postback,I have saved first row text box values in a viewstate. I create these dynamic controls in grid-row-bound function. So I create no of controls as according to value in viewstate stored value.
I thinked that on event function call I will first store the value of current controls then recreate all controls with same id and put back the value.So problem I am facing is that I can't find my controls on event fire. You can see in these two pic what happening because of that 1st pic 2nd pic.
If you want to see the code , please comment of which sections you want to see the code or full code
Here the link to the code click here

Dynamically Created User Control's Dropbox Items from Database resets on postback

First off, I have managed to create a web application where my dynamically created user controls are recreated and repopulated with the correct information upon postback. I am not sure what my problem is, but i hope that you will be able to help me figure it out based on my situation:
On my page i enter the number of controls to be created into a hardcoded textbox (its on the aspx page) and click the okay butten. This in turn, creates the specified number of user controls dynamically using c# in the background.
So far the desired number of dynamic controls are in a table on the page.
Next...
I have 1 textbox and 4 dropboxes on each dynamic user control. When i type a company name into the textbox field and press enter or click away (on text changed event) it autoposts back and the textbox retains the company name that i have typed in.
Based on this string the dropboxes are populated from the database. Now when i select the desired items from the dropboxes and click on the save button (located outside of the dynamic controls, on the page) it does an insert to the database, but it turns out that upon this postback the indexes from the dropboxes have been reset and the wrong values get inserted.
The following pictures show firstly, how it should be and then how it is.
Basically the company name remains in the textbox of the dynamic control, but the information i choose from the dropbox resets to the first index.

It's hard to tell what happend without code, but this is a common mistake:
If you fill/create the dropdownlist controls in the page load event and you post back, the code will refill/recreate the controls. That's why you have to use something like If(!IsPostBack) in your page load event. Otherwise it will execute that code everytime you do a postback and actually just want to execute the code in your event handler for that button.

If you're dynamically creating the controls, make sure to do that in the Page_Init event. Dynamic controls have to be recreated on every postback. Their state is restored after the Page_Init (if it is a postback), so make sure to only set their values in Page_Load if you want to overwrite them.

how do I save custom user control viewstate during postback?

I have written the user control InputDetails that has a few text boxes and a few radio boxes inside it.
I add it dynamically during Page_Load:
if(!Page.IsPostBack()){
InputDetails input = (InputDetails)Page.LoadControl("InputDetails.ascx");
PlaceHolder1.Controls.Add(input);
}
but when I refresh the page, the control is gone, so I'm asking, how do I save the user control in the viewstate that it has been added, so it automatically reloads it next time. Better yet, how do I read the values put in the text boxes of the user control when the page is posted back? I need to be able to add multiple InputDetails on a single page so saving it would be useful.

If you add a control to the page dynamically, you have to recreate it after each postback.
Try to remove the if (Page.IsPostBack()) line and check if it works :).
For each control you create, you should also set the same ID value each time it's created.
If there are no other issues, the ViewState should then be able to save state of the controls across postbacks.
In order to read the values, you can:
add some public properties to your user control in order to get access to the values you need
or
use TextBox txtBox = (TextBox)myCustomControlObject.FindControl("nestedTextBox") method to find (more information here: http://msdn.microsoft.com/en-us/library/486wc64h.aspx)

You can load user controls / server control dynamically using AJAX also and viewstate requires controls ID to store the viewstate properly.
would you pls go through this link for more info

Disabled textbox losses viewstate

I am dynamically generating the form based on the drop down selected.
The form consists of fields (data entry for decimal values + few text fields). Have to add all the decimal values at the end and update the Total TextBox with that value. Total Textbox is disabled.
When I click Save button on the form after the user have entered their values, whole form is persisted in viewstate except the disabled textbox. When I enable the textbox, everything works fine. Mind you, I am dynamically generating the form and updating the value of the total textbox using javascript to calculate (adding all decimal fields).
P.S. I am doing everything right for persisting the viewstate.
So what has the enabled/disabled got bearing on the viewstate

Basically, I added two statements to get it working.
txtBox.Attributes.Add("readonly", "readonly");
txtBox.Style.Add("color","gray");
When I used txtBox.Enabled = false, it didn't persist viewstate but did it alternatively using above two statements in my code-behind page

Yes, disabled form element will not send it's value to server side, you can look request header. disabled element not appeared at "get" or "post" collection.
If you want set user can't edit it, you can set it as readonly.

Add javascript on the page:
function enableTextBoxes() {
$("input[type='text'][disabled='disabled']").removeAttr("disabled");
}
And add to server code (in Page_Load, PreRender or some else method)
ClientScript.RegisterOnSubmitStatement(typeof(Page), "enableTextBoxes", "enableTextBoxes();");
If you use UpdatePanels then utilize the ScriptManager.RegisterOnSubmitStatement method

Please create custom text box rather than using actual textbox instance.
inherit textbox in your custom textbox and add this textbox in your dynamic form.

Form post doesn't contain textbox data [ASP.NET C#]

I have several "ASP:TextBox" controls on a form (about 20).
When the form loads, the text boxes are populated from a database.
The user can change the populated values, and when they submit the form, I take the values posted to the server and conditionally save them (determined by some business logic).
All but 1 of the text boxes work as intended.
The odd box out, upon postback, does not contain the updated value that the user typed into the box.
When debugging the application, it is clear that myTextBox.Text reflects the old, pre-populated value, not the new, user-supplied value.
Every other box properly shows their respective user-supplied values.
I did find a workaround.
My solution was to basically extract the text box's value out of the Request.Form object: Request.Form[myTextBox.UniqueID], which does contain the user-supplied value.
What could be going on, here?
As I mentioned, the other text boxes receive the user-supplied values just fine, and this particular problematic text box doesn't have any logic associated to it -- it just takes the value and saves it.
The main difference between this text box and the others is that this is a multi-line box (for inputting notes), which I believe is rendered as an HTML "textarea" tag instead of an "input" tag in ASP.NET.

Are you initially loading the data only when !Page.IsPostBack? Also, is view state enabled for the text box?

this happens to me all the time.
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
// populate text boxes from database
}
}

I would second Jonathan's response I would check your databinding settings.
If you do not need ViewState for the textboxes (i.e. no postback occurs until form submit) then you should disable it.
It sounds like you are not having problems saving the data (since you said you have managed to get the control to read the correct data back). Therefore, I would say the problem loads in your databinding code.

Remember the order of the page lifecycle, and where you are databinding your form.
PreInit
Init
Load
Your Control Event Handler
If you are reading the value in the Control Event handler, yet databinding in Init or Load, you'll have the old value.
The trick is to always databind in the correct event, or check for postback and don't databind then.

Are you initially loading the data only when !Page.IsPostBack? Also, is view state enabled for the text box?
I had almost forgotten to check the ViewState, but ended up remembering to verify that it wasn't disabled before making my post here on SO. I even set EnableViewState="true" to make sure.
I did find the solution, and it coincided with most of the answers here. The form was indeed loading its data more than once (which is intentional behavior). I implemented some special code for this field, and all is well.
Thanks for your replies, all!