When i execute this page i am getting the following error.
Specified cast is not valid. Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.InvalidCastException: Specified cast is not valid.
I have two textboxes,Suppose I leave the textbox1 empty & press the button,Then alert is there enter value in Textbox1,When the user press ok,Focus is set to dat textbox,I want also to change the backcolor of dat textbox--I think so it is simple,Now when i enter the values in First textbox & press tab to move to second textbox,I wnat the first textbox color to be changed to white.
I have an ASP.net page with two textboxes where the user types in input. I applied a requiredfieldvalidator to both textboxes as well. However, I also want the textboxes to change to a backcolor of red if the form is invalid when the user clicks the button to submit the input. I tried this code below in tthe button click event, but doesnt work...
If Page.IsValid = False Then txtCosts.BackColor = Drawing.Color.Red txtRevenue.BackColor = Drawing.Color.Red End If
How else can I change the Backcolor of the textboxes when the input is invalid.......
I have a gridview control that has a different background color for alternating rows (done using cssclasses). In the RowDataBound event code, I want to change the background color of a ListBox control in one of the cells to match the row color. I have tried the following (in blue), but it does not seem to work. The listbox control still remains with white background. How may I determine the background color of the row so that I may set the ListBox background to match?
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A corollary question is, "How may I programmatically reference an item within a CssClass?" For instance the CssClass is named "datagrid." How do I programatically retrieve the value of "background-color" that is defined in this CssClass?
How do I change the BackColor of the textbox area in an asp.net DropDownList from white to another color? The Backcolor property changes only the drop down section.
I have a gridview which contain textboxes in it. I have database which contain column color, there are multiple color values in database table. While binding gridview, corresponding color should be assign to corresponding textbox in gridview. How can I do that?
Is it possible that I reserve a asp.net code in db and load it at runtime. the asp.net code contains server side tags like Text='<%# Eval("Description") %>'
I'm using a searchoption on my website. (language = VB)
The user can choose a searchcriteria out of a dropdownlist (Artist name, Description, Price, Genre, Type) . If the user selects one of the options in the dropdownlist the correct textboxes are shown.
For example: if the user selects Price he gets two textboxes (one for the min price and one for the max price) if the user selects Artist Name he gets one textbox
The dropdownlist and the textboxes are put into an updatepanel. The searchbutton is outside the updatepanel.
Now for the problem:
If the user doesn't fill in a textbox and presses the searchbutton, the backcolor of that empty textbox should be turned red. The searchbutton is set as a trigger and the panel is updated on the buttonclick, but the colors don't show.
In the clickevent of the button I've said the following code:
If txtCriteria.text = "" then txtCriteria.backcolor = Red Else txtCriteria.backcolor = White End if
Quite a simple piece of code. This works if I remove the updatepanel from my page, but I'd like to keep the updatepanel because it's really nice :p.
When changing the textbox's text mode to multiline the textbox becomes resizable during runtime. I can't seem to find the property to disable this, does anyone know how I can resolve this issue?
I want to resize the height of my textbox during runtime. If I have a list that is one line fine, but if it is two lines I want the textbox expand to two line or three line. How would I do that???
I have a two buttons ( button1 and button2 ), a panel ( panel1 ), a label ( labe1 ) on my Web page ( coded with asp.net and c# ). I want to create 2 textboxs on my page when I click on button1 ( button1_click ).
After that, when I click button2 ( button2_click ), I want to get data of textbox (added on runtime) and write them on label1.
This application is part of my master application. This is very important for me...
can i add new records in gridview by entering value in textbox in runtime?suppose a value is entered in textbox and concerned record is displayed in gridview again if i want to add a new record in gridview along with the old record how can i add?
I am Developing a database web applicationI am Creating web controls on page at runtime i.e in Page_Init event. No textbox are placed on .aspx page at design timeI have a datatable filled with a single record.now i want to bind a textbox (created at runtime) with a column of datatable so that when a page is loaded value in datatable's column is displayed in textbox.Other Important thing i want is when i make any changes in Textbox, It should be reflected automatically in a column to which textbox is binded. So while saving records i can save it directly from datatable. I dont want to write following tedious code before savinge.g.
I have a editable gridview. When I click on edit button corresponding to a row in the gridview I provide two textboxes to enter two new values.2 textboxes as I have 2 columns. Now this textbox are generated at runtime.I want to access this textbox in javascript and perform validation on them.This is the html syntax.
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I 'have' to use IE 6.0.
I have already tried document.getElementbyID for the table and getElementsByTagName adn they are not working.
var curValue = document.getElementById("<%=TableGridView.ClientID%>").rows; curValue is 1 in IE and 4 in firefox.
Can anybody let me know the activex script for detecting .net runtime and directx runtime or any other way how can I detect this in any machine by from my web page ?
I am trying to set the Backcolor of this TabPanel in code behind. But the color of the TabPanel is still white. I also tried the TabContainer with no success.
Is it possible to loop through a gridview and based on if a checkbox is checked, then change the backcolor to that current row? I have gave a few attempts, but luck.
