I'm making a site and throughout the site I haven't been very consistent with the way I get user input on postbacks. For example, say in a button event that takes two strings retrieved from textboxes and adds them together and outputs the string sum in a label:
protected void btnCalculate_Click(object sender, EventArgs e)
{
string text1 = textBox1.Text; //one way
string text2 = Request["textBox2"]; //the other way
lblSum.Text = text1+text2;
}
I imagine you would want to use Request[""] if the data has been posted to a new page, but for this situation, is one way preferred over another, and why?
How do you access a control after postback with __EVENTTARGET in asp.net 2.0 and not get "object reference not set to an instance of an object" Error. Because when I try access a objects property I get that error
I need to access the controls dynamically created template fields at run time in datagrid in post back event. Is there any way to retrieve the values in post back event? Or else give the ideas to acheive my requirement. I need to create no of rows and columns as text box as per user input. After fill the values to text box , i need to access the values in submit button.
I want to access my textbox with id=UserName from javascript but its giving me error (on the highlighted JS line) that UserName does not exists in the current context.
Can any one tell me how to acces a controls value with is residing in asp.net's CreateUserWizard control?
I have a web application (done in ASP/C#) that has regex validation on a text box. Initially the regex works perfectly fine. But then I also provide a button click event (clear) that allows the user the clear text box and change their input for a new query. At this point (page post back) the regex takes control and maintains control of the text box so a new query can't be run. Can anyone tell me what to do so that the regex doesn't fire on page postback and allows new input for validation?
I am using ajax html editor to write a text. I can view it without having problem but I am incapeble of storing it in a Ms Access database. which type do I need to use for this? I tried memo and OleObject type and both didn't work. I used the blow code for that.
I need to insert 5'5 in the height column but access db does not allow it. How can I be albe to insert this data with a quotation mark in the database.
Putting text from LoginName control into Logout Text for LoginStatus control?
[Code]....
I would like for hte full logout link to read: "Welcome, username - Logout Here"
Username is obviously being provided by the LoginName1 control. I am unable to simply use concatenation so I assume I must turn the value of the LoginName object to a string and then concatenate it. Is there a way to do this?
I have a radgrid controlling access to an application for users. There are two columns, a 'name' column and a checkbox 'access' column representing their current access permission. the checkboxes are populated from a database. I would like the to change the checkboxes to grant or deny access to the users I specify. Since there are alot of users I would like to make multiple changes and use a submit button to write the changes to the database. I do not want to postback with each checkbox change and wait for the page to "blink". My problem is that with the checkbox postback disabled, when I click submit, the value of the checkboxes are not registering the changes I make. I need a way to access the current client-side state of the checkbox or some workaround to accomplish this.
I have a button that has an server side event onclick that when triggerd adds javascript code to the onclick event and changes the text value.
On the second click only the javascript code is triggered who changes the text value of the button and sets the client side onclick event to null, while resoponding wiht an return false to counter the postback.
On a real postback of my page the button text value is set back to the latest value given by server side code, it does not keeps its properties set by the javascript client code.
I think this is normal as the button is not posted back or something like that. How could I keep its client side changed properties and let the server side know about it ? Can I modify the viewstate or something similar .... ?
I have a textbox and a button. On page load I select one column from one row and put its value in the textbox. I have a button click method that updates the same column/row with the new value in the same textbox.
The problem i'm having is that when I clear the text in the text box, type in new data and hit submit the new text value is not being saved, it uses the old one.
I put a breakpoint at the end of my button click method and it appears that asp.net is sending the old value of the textbox rather than the new one I put in. I'm totally stumped.
I'm creating a small, private social networking site. I wanted to add 'emoticons' by filtering text such as and replacing it with an image tag. That's easy enough with stringname.Replace() but what i'm wondering is, is there a way to add some sort of a 'filter' that will automatically do that replacement for me on ANY string post back so i don't have to add the replace code to every page?
I've got a simple ASP.Net form with txtBox and btn.
User click btn, which adds text to an ASP:TextBox in a postback (its adding a known "starter text".
After the postback I'd like the focus to be set to the end of the text in the textbox.
If I call Page.SetFocus(...) or txtBox.Focus() then the txtBox gets focus, but at the beginning of the text - which means if the user starts typing, they'll be in the wrong place.
e.g.
cursor100-01
would like it to be
100-01cursor
I've tried the following in the textbox:
onfocus="alert('focus');this.value = this.value;"
but the "alert" only appears the first two times? Then nothing?
If I click this button it is working OK (it will respond with a PFD file so no HTML is sent back to the browser), but if I click another button on the page (which makes a full postback) the LinkButtonPrint will not have the inner content, it will be rendered like this:
<a href="javascript:__doPostBack('ctl00$LinkButtonPrint','')" id="ctl00_LinkButtonPrint" onclick="StartLoadTracking(this, 'Loading...');"></a> If I remove the LinkButtonPrint.Attributes["onclick"] = ... line from Page_Load everything works fine (except my js function is not called, but that is normal).
What am I missing here?
EDIT This is duplicate of asp.net Link button image not visible after postback.
I have a script which creates a dynamic textbox (and more) in an AJAX async post back. But when I try to acess the textbox I am told "Object reference not set to an instance of an object". I have been strugleing with this for a long time. This is written in C# .Net 4. The line causing the problem is the very last one where I have tbGameName.Text.Trim()
I am using two listbox for moving items from one to another using jquery. Auto postback is set to false for both the listboxes. Is there a way to access the items server side on postback?
I have two text boxes and one label control. All three controls are in different "td". Now what i want to do is , i am subtacting a value of textbox2 from the value of textbox1 and storing an answer in label control. I have written a code of subtracting values in the text changed event of textbox 2 and i am also getting an answer in label control. But when text changed event fires, it takes some time to execute which i reall dont like. this is why i want to use update panel to reduce that time. how can i use update panel in this kind of situation. i tried but not successded. so please write some code here related to my controls.
