NOTE: i havent implement the above solution but closing this question and accepting this as answer even thou i havent implement.
what is the best way of doing? and i know that i can store the repeater in a different var and compare but i just wanted to know the elegant way of doing.
here is my for loop code that i want to compare and update the values that have changed and ignore the values that have not changed
GridViewRow row = gv.SelectedRow;
Repeater _rpt = gv.Rows[e.RowIndex].Cells[8].FindControl("rptReg") as Repeater;
Repeater _rpt1 = gv.Rows[e.RowIndex].Cells[9].FindControl("rptVisitor") as Repeater;
for (int i = 0; i < _rpt.Items.Count; i++) {
TextBox _txt = _rpt.Items[i].FindControl("txtId") as TextBox;
TextBox _txt1 = _rpt.Items[i].FindControl("txtName") as TextBox;
if (_rpt1.Items.Count > i)
TextBox _txt3 = _rpt1.Items[i].FindControl("txtVisitor") as TextBox;
//update db
}
}
It's a total hack and I'm sure there is a more elegant way to handle it but you could throw a hidden field in there and set up your form elements with an onchange script to update the value of the hidden field. Then just check for the value of the hidden field.
Hopefully someone has a better way to do it than that but if all else fails.
If you add a class to the hidden field of "hiddenIndicator" and to your form elements of "causesChanged" then the following Jquery should do what you want:
$(document).ready(function() {
$('input.causesChanged').change(function() {
$(this)
.closest('tr') // get the parent row
.find("input.hiddenIndicator") // find children that match the selector
.val('1'); //the value that indicates a change occured
});
})
I haven't tested that code but I used something similar in a project once.
Related
Is there a method on a <asp:DropDownList> that is equivalent to the OnItemDataBound on Repeaters?
The reason is I want to check each value before putting it in the drop down list.
Nothing similar to OnItemDataBound which will give you an item context.There are events like OnDataBound which will get triggered when it reaches binding.
Your reason for asking this event is for enriching the row instead to filterout, which would not have helped you even with this event.
The best option to solve your question
The reason is I want to check each value before putting it in the drop
down list.
is to do some thing like the following pseudo code
this.YourDropDownList.Items.Clear();
var lst = new List<ListItem>();
var yourCollection= <YOURCollection after Apply Linq Conditions check>
foreach (var obj in yourCollection)
{ //loop and add
this.YourDropDownList.Items.Add(new ListItem {Text = obj.Prop1, Value = obj.prop2});
}
I want to create dynamic text boxes during run time.
Suppose im gettng a text from a database as "# is the capital of India" now i want to replace that "#" by text box while it is rendered to user as below
<asp:TextBox runat="server" id = "someid"></asp:TextBox> is the capital of India
Im able to get the textbox and text as combination. However I cannot access the textboxes with the given id and when any event occurs on the page the textboxes are lost as they logically does not exist untill their state is stored.
I also went through the concepts of place holder and Viewstate to store the dynamically created controls and make their id's available for the methods, but as far as I tried I could not meet the textbox and text combination requirement.
Im looping over the entire text recieved from database and checking if there is any"#". Is yes then i want to replace it with a textbox on which i can call methods to take back the value entered in the text box to database and store it.
eg: text is "#" is the capital of India
for (int i = 0; i < que.Length; j++) //que holds the text
{
if (que[i] == '#')
{
//Textbox should be created
}
else
{
//the texts should be appended before or after the textbox/textboxes as text demands
}
}
On button click I'm passing request to database, which will send me necessary details i.e. question text, options and also saves the current checked value etc.
protected void BtnLast_Click(object sender, EventArgs e)
{
CheckBox1.Checked = false;
CheckBox2.Checked = false;
CheckBox3.Checked = false;
CheckBox4.Checked = false;
QuestionSet q = new QuestionSet();
StudentB b = new StudentB();
q = b.GetQuestion(1, 1, qid, 'L', 0, Checked, date);
qid = Convert.ToInt32(q.Question_Id);
Checked = q.Checked;
if (q.Question_Type == 11) //indicates its objective Question
{
//ill bind data to checkboxes
}
else if (q.Question_Type == 12) // indicate its fill in the blanks question
{
for (int j = 0; j < que.Length; j++)
{
if (que[j] == '#')
{
count++;
string res = "<input type = 'text' runat = 'server' id ='TxtBoxFillUp" + count + "'/>";
htm = htm.Append(res);
}
else
{
htm = htm.Append(que[j]);
}
}
}
}
Any help will be greatly appreciated, thanks in advance.
Adding control in the way you do it won't create control as asp.net creates it. You do have to create controls as usual .net object.
TextBox myNewTextBox = new TextBox() {};
// Set all initial values to it
And add this cotrol to placeholder or panel, whatever you use. Keep in mind that asp.net page events fire even if you use update panel, so in order to maintain state and events of newly created controls you have take care of creating such controls long before page's Load event fires. Here is my answer to another simialiar question.
Seeing the requirements you have:
1.) You need to use JavaScript. Since the ASP.NET will not recreate controls which are dynamically added. Dynamically added controls need to be recreated after every postback. This is the reason why your TextBoxes are Lost after every postback.
2.) You can write JavaScript code to Hide and show the textboxes for blank texts since at every button click you can call Client side functions using: OnClientClick() property of buttons.
3.) Also to Get the TextBoxes using ID property, add them in Markup( .aspx ) portion itself.
Hi
In ASPxGridView, is there a way to get a row by its VisibleIndex or KeyValue so that I can change any column value in it?, I mean something like this:
var row = myGrid.SelectRowByKeyValue(myKeyValue);
OR:
var row = myGrid.SelectRowByVisibleIndex(myKeyValue);
row["Column1"] = true;
Edit:
What I'm tring to do is that every time I hit the button I want to check one specific row (I'm using ajax to not reload all the page);
Thanks
This can be done using the ASPxGridView.GetRow() method. NOTE, that changing the value in the DataRow is not enough. If you want these changes to be preserved, save them to the DB.
Since you are using unbound columns, you should handle the CustomUnboundColumnData event and provide modified data for this row within this event handler. The common approach is described in the Providing Data for Unbound Columns topic. If this does not help, please describe in greater details.
UPDATE
Your approach is incorrect. The ASPxGridView does not provide a method to set a text of a certain cell (TD). Instead, you should force the grid to raise the CustomUnboundColumnData event. This can be done using the ASPxGridView's DataBind method. In this event handler, you should determine the KeyField value of the processed row, compare it with the keyField value of the row where the button was clicked and return the required value. This is how I would implement this feature...
I solved it by using this code:
for (int i = 0; i < myGridView.VisibleRowCount; i++)
{
if ( [My condition] )
{
(
(CheckBox)myGridView
.FindRowCellTemplateControl(i,
myGridView.Columns["MyColumnName"] as GridViewDataColumn,
"My_Unbound_Control_Name"
)
).Checked = true;
}
}
I's may not be the right way to do it but I couldn't solve it another way.
I want to instantly update a status line indicating the number of checked checkboxes across all pages of an asp.net gridview. Right now I am only ably to count the number of checkboxes that are checked on the current gridview page.
Here is my code:
$(document).ready(initAll);
function initAll(){
countChecked();
$(".activeBoxes").click(countChecked);
}
function countChecked() {
var n = $(".activeBoxes input:checked").length;
$("#checkboxStatus").text(n + (n == 1 ? " vehicle is" : " vehicles are") + " selected on this page. ");
if( n == 0){
$(".activateButton").hide();
$("#checkboxStatus").hide();
}else{
$("#checkboxStatus").show();
$(".activateButton").show();
}
}
Keep a hidden text field on your page and everytime you check a box, call a javascript method that will write the 'id' of the checkbox to the hidden field. Each time you postback your page, serialise the hidden field's value to the session in your desired objects structure (be it objects, hash table, array etc).
Upon rendering the page, each checkbox can check the session object structure (that you have created before) and determine if the state of the checkbox was last checked or not.
You could use JQuery to loop through all checkboxes on the page and increment a counter if the checkbox is checked.
You can track the total selection in viewstate (or something similar) on page change. I did something similar tracking the selected row ID's in an array. In my case I had to re-check the items when they returned to the page. Additionally if you allow sorting the selection may move across pages.
Edit: Sorry this doesn't actually your Jquery question, but maybe it will help...
What you're missing is removing the ID. When checking rows and tempid is not checked make sure it is not in saveids.
Do you know that Google is your friend?
Selecting CheckBoxes Inside GridView Using JQuery
The WML Video
And without JQuery but for more perfectionist behavior (like the image below), try this link
alt text http://www.gridviewguy.com/ArticleImages/GridViewCheckBoxTwistAni.gif
I am using a viewstate to keep track of all checked items across all pages and rechecking them upon returning to the page.
I will have to add my viewstate value to the page total and somehow subtract overlapping totals. Since my jquery does not include an id, this will be tricky.
protected ArrayList savedIds;
if (ViewState["SavedIds"] == null) savedIds = new ArrayList();
else savedIds = (ArrayList)ViewState["SavedIds"];
List<int> activateList = new List<int>();
foreach (GridViewRow tt in GridView2.Rows)
{
CheckBox cb = (CheckBox)tt.FindControl("ActivateItem");
HiddenField id = (HiddenField)tt.FindControl("IdField");
if (cb.Checked)
{
int tempId = 0;
string tempId2 = id.Value.ToString();
int.TryParse(tempId2, out tempId);
activateList.Add(tempId);
}
}
foreach (int activateId in activateList)
{
if (!savedIds.Contains(activateId.ToString())) savedIds.Add(activateId.ToString());
}
ViewState["SavedIds"] = savedIds;
I want to add an item to an ASP.Net combobox using Javascript. I can retrieve the ID (No Masterpage). How can I add values to the combobox from Javascript? My present code looks like this.
//Fill the years (counting 100 from the first)
function fillvarYear() {
var dt = $('#txtBDate').val();
dt = dt.toString().substring(6);
var ye = parseInt(dt);
//Loop and add the next 100 years from the birth year to the combo
for (var j = 1; j <= 100; j++) {
ye += 1; //Add one year to the year count
var opt = document.createElement("OPTION");
opt.text = ye;
opt.value = ye;
document.form1.ddlYear.add(opt);
}
}
To see the value on postback:
string selectedValue = Request.Params[combobox.UniqueId]
Remember, changing the values in a combobox with javascript will cause an Event Validation exception to be thrown, and is generally a bad idea, as you'll have to explicitly disabled event validation.
I'd recommend placing the combobox in an update panel, so you can read txtBirthDate on the server and generate the appropriate data. You then won't have to manually preserve state either.
Always remember, ASP.NET controls are nothing "fancy" - they always end up at some point becoming standard HTML elements.
Try checking out this site. It has a pretty nice demo and overview. Take note however that you are altering the data at the client side - this means you will need to do it on each and every request because the ViewState will not be updated.
TBH, you are probably better off just using a HTML control rather than ASP ComboBox..
Can I ask why you are changing items via Javascript? (out of curiosity) :)
I found a possible solution. I don't know why the earlier code didn't work for me, but the line below
document.form1.ddlYear.appendChild(new Option(ye, ye));