Forms Data Controls :: How To Dynamically Change Values Within A Data Binding Expression

Jun 8, 2010

I have a repeater control populated with data binding expressions like in the expression below...


I want to be able to redirect a user to default link if the LinkURL value is empty, that is for each data item, there will be a check if the LinkURL field contains a value. If not, a default value will be supplied.

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I want to dynamically bind dataset values into datagrid's header datafield.

Is it possible? To be more clear, when you click on datagrid's (Collection) from properties window, you get selected columns created from Bound column. So in those columns I want to dynamically display dataset's table values in those columns.

i.e like ds.Tables[0].Rows[0][0].

Is it possible to do it in Datagrid ItemDataBound function like,

e.Item.Cells[1].Text = ds.Tables[0].Rows[0][0]

or something like this? I know the above code is wrong and wont work since I tried it out and while building it throwed error saying, Cannot implicitly convert type 'object' to 'string'.

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Forms Data Controls :: How To Pass Control Reference To Its Property In Data Binding Expression

Nov 24, 2010

Here is data binding expression (dropdown list is nested in gridview)


Code Behind has function which looks like


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Data Controls :: Dynamically Change GridView Values Without Updating In Database?

Aug 24, 2013

how to change gridview cell value for a checked row without affecting any changes in database for ex if a row contains quantity of item 6 i want to change it value to 5,4 upto 0 that is on click event of delete quantity button i have identified row with a checkbox in grid view.

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Forms Data Controls :: How To Handle Empty Values When Binding Data

Jul 21, 2010

I have a grid which is binding to a objectdatasource and when it is in edit mode, i am displaying a form template and wanted to bind all the values. I have one field called ApprovedCode. In the edit mode, i am displaying all the codes drop down list box and making a bind on the selectedvalue and i dont know how to handle when it is empty. When it is empty i wanted to display "Select..."

I followed this forum post but i am getting error


This is my code


This is the error message that i am receiving

"ddlApprCode' has a selectedvalue which is invalid because it does not exist in the list of items

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Forms Data Controls :: Adding Queryextender Expression Dynamically To The Page?

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I am trying to dynamically add a queryextender expression to the page. something like, when the user clicks a button, we need to add a OrderbyExpression. The following is the code used. It works when added in Page_Load but doesn't when added on a button click event. Upon button click the page just reloads and ignores the filter condition.

OrderByExpression obex = new OrderByExpression();
obex.DataField = "ProductName";
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tb.DataField = "UnitsInStock";
tb.Direction = SortDirection.Ascending;

where queryextender1 is the ID of the queryextender

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Feb 1, 2011

I am using VS 2005.I have 5 tables depending on their values ,I need to draw a bar chart.

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Forms Data Controls :: How To Change The Values In Gridview On Text Change Of Templated Control Without Databind Again

Apr 20, 2010

How to change the values in gridview on text change of templated control without databind again?the value of templated text boxes should change If i change the value of one of the templated textbox then accordingly(By mathematical calculations) the vlaues of all tempated textboxes should also change.

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Forms Data Controls :: Change Image In Gridview After Binding?

Sep 27, 2010

I have a need to change the image (bound) in a gridview after it has been databound. Basically i need to assign a photo to a record and I want to change the image url for that row. I can change the text in any of the cells of the row but I can't seem to find property for the imageurl.his is what I do to change the text(cell 5).

int index = int.Parse(Session["NSI"].ToString());
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But now I need to change the image url for cell 0something along the lines of ...

row1.Cells[0].ImageUrl = "~imagesphotos12345.jpg";

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Forms Data Controls :: Dynamically Binding The Usercontrol On Button Click?

May 5, 2010

1. When executed I have a "Add Building" and "Click here to add tower" on the page.

2. When clicked on "Add Building" a editable gridview appears when I enter the text and say update.

3. When I click on "Click here to add tower" another button "Add Tower" is displayed on the


4. On this "Click here to add tower" event I have called the usercontrol, where the usercontrol has a editable gridview and a button called "Add Tower".

5. When I click on "Add Tower" a editable gridview should be displayed but the editable gridview is not displayed ,it disappears.

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Forms Data Controls :: Binding Scalar Values - Get Value In OnItemDataBound?

Jan 21, 2010

I have a question on Scott's article about binding scalar values to data controls: [URL]

On the seconde example (the one using templates), how would I access the scalar value in the controls OnItemDataBound event? e.Item.DataItem seems to be null....

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Forms Data Controls :: Change Formview Binding Programmatically At Runtime?

Oct 18, 2010

I have a formview bound to an entitydatsource and it is working fine. here's the scenario though

If the querystring contains a "memberID" , I have setup an object datasource to fetch the results corresponding to the memberid from the database.

I want the name and email id fields in the formview to default to these values in the objectdatasource. How can you do this?

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Aug 2, 2010

i wanna creating a gallery in my website by using datalist,

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i wana get it dynamically,

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Forms Data Controls :: Modify Values In A ObjectDataSouce Before Binding To GridView?

Feb 2, 2011

I need to modify the value of results returned by a Objectdatasource, before binding to the GridView.

More specifically, I need to use Page.ResolveClientUrl() before binding the

RelativePath to the Img Tag-
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Forms Data Controls :: Change Binding Based On Formview Insert Or Edit?

Apr 24, 2010

I'm using an edittemplate to handle both editing and inserting for a Formview. In Insert mode, the Identity parameter is not needed (and cannot be used in the parameter list). In Edit mode, I need the bound value to know which record to update. So, what I tried to do is set the Text property in the OnDataBinding method.


The result is that the field is bound for Insert anyway, shows up as a parameter, and my insert statement fails (since this extra field messes up the field order of the parameters). Plus, it is always null in Insert mode by definition.

Is the OnDataBinding method too late to clear the property? If so, where can I do this, since PageLoad is too early (the template has not loaded yet and I cannot Findcontrol the field. Or is there a better way to handle all this?

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Web Forms :: Inline Expression Or Binding Expression In The Server Head Section?

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I write inline expression and binding expression in the server head section:



But both kinds of expression aren't parsed or executed except the ResovleUrl menthod. The html renders like this:

<head><link rel="stylesheet" type="text/css" href="<%= Request.ApplicationPath %>themes/style1.css" /><link rel="stylesheet" type="text/css" href="<%# Request.ApplicationPath %>themes/style2.css" />
<link rel="stylesheet" type="text/css" href="/themes/style3.css" />
<script type="text/javascript" src="/js/jwork.js"></script>

As I know, the inline expression in the attributes of server control can't be parsed but the binding expression should if we invoke the DataBind method. But the above case breaks the rule.

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Forms Data Controls :: Change Values / Dropdowns Without Rebinding Old Data And Updating Visibility Of Panels Based On Predefined Rules

Aug 26, 2010

I am working with a formview edititemtemplate. Currently in my page load, i have some stuff that would show or hide certain panels based on dropdownlist values. These dropdown values get binded during page load. I need to be able to change the values/dropdowns, without rebinding the old data, and updating the visibility of the panels based on predefined rules.

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why the following instruction does not work?

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<asp:TemplateField ItemStyle-CssClass="phoneCostsPhoneStyle" >
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Data Controls :: How To Dynamically Bind Data To DropDownList And Change Datasouce Value Of GridView

Oct 2, 2013

I have a problem ,i want to 2 dropdownlist box on a form and one will take loaded from data at the time of pageload and data of second dropdownlist box will change according to selected item in first dropdownlistbox ,and after that gridview will dynamicaly bind from some data according to choosen data of second dropdownlistbox .

I uses lots of code but  i am not able to dynamicaly bind dropdown and gridview

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Forms Data Controls :: How To Get The Values Of Checkboxes Which Are Dynamically Created

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I am new to I am trying to display some data from a database table using dynamic table in my page. I want to add checkboxes to a field in the database and would like to perform several tasks based on the values checked. The checkboxes are tied with the primary key field of the database. Here is the code snipet :


Now I have a button in my page. The functioanlity which I desire is on clicking that button I should be able to extract the values of checked checkboxes and perform some function.

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Forms Data Controls :: Getting Values For Dynamically Created Radiobuttons?

Jan 4, 2011

I am creating a project that dynamically creates radiobuttons. So far, i'm done with creating those radiobuttons dynamically. My problem is getting the values from those radiobuttons. To get those values, I need to click the submit button, however it seems that the radiobutton value or the radiobutton itself is lost after I click the submit button.

here are my codes, though not my exact codes, it follows the same logic...

protected void Page_Load(object sender, EventArgs e)

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How can I change gridview templatecolumn order dynamically?

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Feb 9, 2010

I have a gridview. .When I add new data to gridview, I want to change gridview selectex index dynamically. I want to set gridview selectedindex the new added data .

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