If I have a datatable with 5000 rows for example can I do a select statement by row numbers. like paging throught it so I don't have to display all 5000 in the datagrid.. i want to go forward and back by 100 rows
vb.net 2008 (vs 2008)
For example:
dgInbox.DataSource = dsInbox.Tables("Inbox").select(between rows 200 and 300)
So how would I use .next (random numbers) to randomly select something from a list of numbers but it can't repeat the number?I could do:
dim num as integer
dim r as new random
num = r.next(1,5)
if num = 1 then
elseif num = 2 then
etc.
That wouldn't work because it would repeat.If I donwload someone's game can I disect it in VS? :0 I tried going to open project, then I went to the folder and clicked open. It brought me inside of the folder so I tried to open the game but there is no form1 there. It says the games name then .exe in the explorer-like thing in the top right?Also, how would I have a value or something in a label and access it from a button.
Example:This is in a label.
Dim number as Integer
number = 0
Then in the button do
Label.number = 0
How would I do something like that? I want to use that a lot as I did in a different language.
I have just about completed a .NET project to write a program to randomly select numbers for a Bingo caller. Over the last month or so Ive learned a lot about .NET but heres something that I consider to be odd and maybe one of you guys can offer an opinion.
One of the features of calling Bingo in a small local club is that callers often use little sayings to accompany certain numbers, I expect youve all heard of (say) All the sixes, clickety click for 66 or 5 and 9 the Brighton line for 59 etc. My little program gives an option to incorporate these with a prompt for the caller that can be edited outside of the program. One of these conventional sayings is used when a number is reversed 12 followed by 21 or 45 followed by 54 for example, when the caller might call (say) 1 and 2, one dozen, number 12 And the other way round 2 and 1, twenty one.
So, I programmed in a bit of code to detect this and to over-ride whatever might otherwise have been the quote with And the other way round and set about testing it. Ive been through literally dozens of full 90 calls watching for the occurrence of a reversed number, spent a few hours doing it, and not once has it occurred which is to say the least, unusual.
So, Im wondering about the Rand Function, could it be that it isnt possible for a reversed number to be selected? Just so you know, I randomly pre-select the order of all 90 numbers, I fill each of the 90 elements of an array with a random number first checking that the number selected hasnt already been stored, if it has, I just get the next random number (and check that too of course), but I cant see how that could prevent reversed numbers being selected, especially in light of the fact that frequently it's not the 'next' number that's used.
I have the following SQL:
[Code]...
I want to put it (the select count statement) in this LINQ statement so I can get the sales count in my linq statement: Dim TheLeads = (From L In DB.Leads Where L.IsDeleted = False Select L).ToList() Is this possible to do in LINQ?
A co-worker wants to convert the following IfThenElseIf statement into a Select Case statement.
Explain why this is not possible.
If temperature = 100 Then
X = 0
ElseIf population > 1000 Then
X = 1
ElseIf rate < .1 Then
X = -1
End If
have a table with following fields
Emp_id varchar(50)
Emp_Name varchar(50)
Emp_surname varchar(50)
[code].....
I need to use a SELECT statement to select all data under a column name (like all employee names) and then to add the values to a listbox.
I usderstand that the select statement must be:
"SELECT * FROM EmployeeTable WHERE EmployeeNames LIKE *" (at least I think)
but then what? combobox1.fill ("EmployeesTable") ?
I have a table which contains a list of products for a company. They input data about how much stock they have and also the level at which they want to be reminded that they need to order new stock.
[Code]...
I want to list all the true results in a form which the user is then able to navigate through. What would be the best way to go about doing this?
how to write a program that uses a Do while statement and a For ..... Next statement to print the numbers from 1 TO 10 step 3
View 2 Repliesi am probably overthinking this but how can i check the textbox for either a 655 or 699 in the first 3 numbers in the textbox? The current code i how now works but displays an error if (im guessing) it doesnt find the other number in the textbox as well:
[Code]...
The application I'm doing requires me to "enter the size of an array in a TEXTBOX, then click a button, a list of random number would show up, then re-arrange from Lowest to Highest".For ex, i enter "5" in the TextBox, then an array or list of 5 random number will show up vertically on the ListBox. I already got this part done. Now the thing is, I have to make a For...Next statement to rearrange them from Lowest to Highest.
View 4 RepliesAm new to programming and i would like your help to this question. [b][color="Red"]Write a declaration statement of an array of integers to store 15 numbers. Initialise the first 5 values.
When I open the Visual Studio 2005 I don't see the template i.e. Win32 Applications, C++
with the following code which gets stucked on the line of reader = Cmd.ExecuteReader(). It says the SqlException was unhandled (An expression of non-boolean type specified in a context where a condition is expected, near '7/2/2010'.)
[Code]...
I have successfuly connected to a database and have create a select statement (with access) which works most of the time except when im trying to perform a where statement with a date:
strEmployeeDepartmentLocation = Application.StartupPath
con.ConnectionString = "PROVIDER=Microsoft.Jet.OLEDB.4.0;Data Source = " & strEmployeeDepartmentLocation & "swineFlu.mdb"
strSQLSelectQuery2 = "SELECT NumberOfCase FROM table1 WHERE Date = 21/04/2009;"
i dont no if im writing it in the wrong format or what but it dont seem to bring back any data
I wrote a program to convert numbers to roman numerals but something in my code is making every number I put in return a ""I" roman numeral. Here's my code.
[Code]....
I have a datatable and I would like to get the MAX number from this table where Term Number (first Column) is a certain value. If my datatable is declared as dtMyTable, I'm assuming I need to use dtMyTable.Select(), but I'm not sure if this is the best way.
View 2 RepliesI'm using Vb2005 and Db MS access Is it possible to use tow Select in same sql Statement like this example:
Code:
"Select....Select......."
I have 2 dropdown lists, 1 label & 1 textbox.on selection of 'product categories' @ 1st ddl, 2nd ddl displays all product categories.question is, how may i display the product category id @ the label, and name @ the textbox, on load/selection of 2nd ddl?[code]....
View 3 RepliesI have a sql statement
SQL = "select * from Candidate where test_date = " & TextBox2.Text
I am getting error in the line myDataAdapter.Fill(myDataSet)
Conversion failed when converting the varchar value '03/15/11' to data type int
In my sql server test_date column data type is varchar.
I am tryin to access a 2003 Microsoft Access Database using VB in an OleDb format. The database file name is Billings.mdb and there are 3 tables in the file the one I am trying to access is tbl Clients. When debugging the program I continue to get an Unhandled error point to the FROM part of the SELECT statement. It continues to occur regardless of my attempts to vary the input.
In the program my connection statement is as follows:
Dim connectionString As String = "Provider = Microsoft.Jet.OleDb.4.0; Data Source = C:Documents and SettingsTrialsBillings.mdb"
The Select statement is as follows:
Dim selectStatement As String = "SELECT ID, ..., PB " & "FROM tbl_Clients " & "WHERE ID = ?sngID"
Basically, I have the following sql select statement in vb.net.[code]...
From the above statement, I would like retrieve several data and the count of Traceid from trn_Invt_Details where the traceid in trn_Invt_Details match with traceid in trn_Invt. By the way, it will also based on the criteria where the field of ErrorType in Trn_Invt_Details is Null or contain empty string. Then it will retrieve out the count of traceid.Finally, all the results will save to dataset in vb.net
What's wrong with this ?
ERROR: Type mismatch in expression.
conectare_db()
data_table = New DataTable[code].....
I just replaced a different segment of code with the select case statement and it works fine. However I don't understand what the dim is for after you do "Select case [variable name here]"
I currently just dimmed a value as nothing. I didn't specify any data type for my variable I'm using for this case statement. But it works.[code]...
I am using vb.net 2005. I am trying to select data from a table where the field [hoteldate] is 2 days from now. The field's format is MM/dd/YYYY and when I use the Where clause :WHERE HOTELDATE = DATEADD([DAY], 2, GETDATE()) it returns nothing. I am assuming it's because the getdate() function returns something like 2012-24-02 T blah blah. How do I convert so I can get a match? I've tried several things including converting do a
View 4 RepliesI have a simple vb script which extracts some data from our accounting software to a text file. It works fine when I do not use a variable in my select statment as follows:
xselect = "SELECT SourceJournal,JournalRegisterNo, PostingDate, PostingComment,UserCreatedKey
FROM GL_DetailPosting
[Code].....
I have a select statement, this select statement comes back on a slqadapter, would l would like to do is like
textbox1.text=sqladapter.(columane1)
textbox2.text=sqladapter.(columane2)
and so forth instead of filling a datagrid.
I'm using the following statement to search an Excel file. It specifies Sheet1$ and I would like to do a search that included another 12 sheets. Is there syntax that allows a search across several sheets?
View 13 RepliesI was using an If block to see if a line in a file contained a specific string. But I need to look for many different string and do different things based on each. So I don't want a million nested If blocks. So I decided to use a Select statement. But, I can't figure out how to use .Contains with it. If I do .ToLower.Contains, like I did in the If block, it stops me.
VB.NET
For Each _line In lineList Select Case _line.ToLower
[code].....
I have a numeric updown. And I was looking for a way to select the numbers when a user gets focus. I know how to do this for a textbox, but there is no SelectionStart/SelectionLength expression.
View 10 RepliesI know i must use Stored Procedures as much as Possible, but i would like to know the following.
A: Can i get a SQL Injection attack from a SELECT statement such as (Select * from MyTable) ?
B: Also, can i get a SQL Injection attack when I use the SQLDataSource in ASP.NET?