Store The Previous Value In Another Variable?
Feb 2, 2010'ValueNow is updated by an external link eg ADO.NET
Dim PresentValue as Decimal
Dim PreviousValue as Decimal
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'ValueNow is updated by an external link eg ADO.NET
Dim PresentValue as Decimal
Dim PreviousValue as Decimal
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I want to retrieve previous row value in current row just like below (Crystal Report 2008):
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I want to set a variable date in the format Y-m-d 20:00:00 of the previous day.
View 3 Replieswhen the form loads, there is a table and i use code to set the row count to a variable from a previous page. this works fine. the problem i am having is that i cant get the row height sizes to be evenly spaced, there is 1 huge row then heaps of tiny ones.
View 7 Repliesi am trying to retain the value of a variable from a previous page. i believe this is the C# way to do this, but i would like the vb.net way can someone please help:
TextBox myTxt = (TextBox)Page.PreviousPage.FindControl("previousPageTextBox");
currentPageTextBox.text = myTxt.Text;
i would like to know how to code this in vb.net i tried this:
Dim myTxt As TextBox = CType(Page.PreviousPage.FindControl("Textbox1"), TextBox)
TextBox1.Text = myTxt.Text
but i got this error msg:use the new keyword to create an object instance
the code below is for creating controls at runtiem, but i have realised even tho i remove the controls and then add controls, they are keeping their settings and more so the Data, eg the checked list boxes are keeping their data so if i do some work with 1 of the 3 pannels then when i change the pannel im working on it still has its lists, how would i go about using a 'frest template' as in a clear all previous settings just so their isn't any possable errors.
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How can I store the value of a variable into another variable that wont be changed unless it meets certain criteria
View 1 Repliesi have 23:23:30 in a texbox and i like to store this in a variable ,if i put a variable m1 as decimal, i have a message error,if i put string , i have 0 and not 23:23:30,why?
View 11 RepliesHow can I store the value of a variable into another variable that wont be changed unless it meets certain criteria
View 2 RepliesI got Minimum date from database using sql qry, And when i try to store that min.date in one variable, its getting error, PlZ help me. for below coding.
Dim qry as string
Dim Min_Date As Date
If SqlCon.State = ConnectionState.Closed Then
SqlCon.Open()
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Can someone give me a simple example on how can I store/appear in a variable/or a textbox a value that i retrieved from a database. The sql query is something like "Select Comment from Params where id =1".
View 5 RepliesJust wondering if it's possible to store a reference to an object in a variable.
I will elaborate:
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Can I store the common operators such as '>', '<', '+' etc., in a variable and then use it when required.
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so here instead of directly using > and +, Can I use the variables OP1 and OP2 somehow. May be I can put the entire string from "If..... NUM1" in another variable as text string and then execute that variable.
I have a program where I open files and I store the location as a variable so I can reopen them later on. It works much like MS Word does, where it shows the names on the side and when I click it and open, it will open the file. Mine is a little different because it will store large numbers of file names in a list box because people are usually going to open folders full of files. The initial way I did it had the path name stored in a list box and it would open the file using that path. I decided it was a bad idea and I tried to use just the name of the file. However, I ran into a problem with the code that I was using.
Code:
If its checked, it will open the selected item from the list box instead.
If CheckBox1.Checked = True Then
'for all the indexes of the saved location record of array, if the selected item is found, then open that file
For counter = 0 To SavedLocations.GetUpperBound(0)
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So as you can see, what I have is it decides whether you opened from the list box or not. If it is not from the list box, it opens it up fine. It adds the information to the list box and stores some information in an array so I can access it later on. If it does open from the list box, then it will search for the file name in the array. If it finds it in the array, it will proceed to open the file using the directory. There is no else clause because it should be finding it 100% of the time.
The error I get is that parameter cannot be null. Filename2 never seems to get assigned, which means it's not finding the value in the array. I've tested and the value is in the array and the values are the same values.
In Datagridview, Set as DatagridView1.ReadOnly=True,
Dgv1.Rows.Add()
When i tried to add a Row, it is copying previous Row data to new row,and also blank the previous row, why?Like Insert Row, Why...?
I have a file which is opened and the bytes are loaded into a class.The file needs to be split into chunks, and there is a header which gives the locations and sizes of the chunks.Should I (upon opening the file) split the file into chunk sand store each chunk in an array of variables And then when I want to access the data in the chunks I just use the array.
or store all the chunks in one variable together and then when I need access to the chunks get the location and size of them and use that to find chunks each time I need to modify them.
Class1:
Dim v as integer
public sub storeVar(byval s as integer)
v = s
end sub
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I need to save a reference of variable s in Class2 in variable v in Class1.(i.e. when the value of s changes v also changes (and vice versa)Is this possible since vb.net doesn't have pointers?Will it work if I change "byval" to "byref"?
I am doing a college project for a driving instructor, so the heart of the program is getting the booking part right. I've made a structure in a module:
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I would like to store a plain text logfile (approx 6 - 30 kB) in a variable belonging to a class that I later serialize. One way to do it is obviously reading it in and storing it to a string.
View 3 RepliesI have a query that brings back a result that I want to be able to use on all forms in my project. Is there a way to store this until the application is terminated?
For example,
I'd like to store the result of this:
Dim ssSQL As String = "SELECT ClaimNo, Custodian, Activity, Code, DateStamp FROM [Activities] WHERE "
ssSQL &= "[ClaimNo] Like ('" & txtClaimNum.Text & "')"
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Try to store hex value D9 to byte variable.
Dim x As Byte
x = encText.GetBytes(&HD9)
When Debug.Print for check, answer show hex 83 (decimal 131). Why it cannot store correct hex value?
Is it possible to detect when any button on a form is clicked and then store that buttons name in a variable?
My reason for wanting to do this is because i have over 700 buttons in my form and each one needs to do something different. I want to create one sub with if statements to respond to all button clicks.
I'm looking to store the result of SQL count function in a variable, i've tried numerous ways but haven't managed to get it to work?
View 3 RepliesIm trying to get the result of an SQL statement and store it in an integer variable "count" in vb so it can then be displayed on my website showing the user the total Open records:SELECT COUNT (recordID) FROM [tbl_Records] WHERE [Status] = 'Open'
View 2 RepliesHow to store today's date in a variable?
View 3 RepliesI am using VB.net Code.I have got below string
[URL]
Now I want to split above string with "/" as well I want to store value SearchTrainerData.aspx in a variable In my case
Dim str as String
str = "SearchTrainerData.aspx"
give my the code which will split the above string further store it in a variable?
My application sends information from Form1 to Form2 by means of a global variable on Form1 whose value is read by Form2.
This variable is basically used to tell Form2 what it has to do because it's value will change depending on different conditions.
All form2 is meant to do is load data from a database into DataSets which will "ported" to Form1 (the main form) for consumption. I use a Form for this rather than a class because there's a lot of data that will be loaded each time it's visible and I wanted[code]...
I'm traying to write some query but I don't know much about DataBase. I have a variable that store the value entered on a textbox and I want to look value in the DataBase and then show the record on the DataGrid. I'm traying to build some query but I think I'm way off.
Here is my query:
SELECT Name, Record, Plan, [Numero de contrato]
FROM [Record de Pacientes]
WHERE (Name LIKE '%Variable%')
I have added a progress bar user control which I downloaded to my project. The code follows:Public Class UC_PBar Define a variable to store the current percentage of the bar, to save use recalculating
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The problem is I need to preserve all previous coordinates so I ReDim Preserve but I need to do it to the Class. And I try this and the NodeCoords variable is set as "nothing" when i am debugging realtime.