I used this line
.RecordSource = "select * from tblpersonal where empid like '" & Me.lblIDNumber.Caption & "*'"
...my question is, what if I use a variable (varIDNumber) instead of object (lblIDNumber), what would be the syntax? I am using VB6.0
You didn't mention txtIDNumber in the code -- you mentioned lblIDNumber. I assume you mean for those two to be the same. In other words, the code you have at present should be something like this:
.RecordSource = "select * from tblpersonal where empid like '" & Me.txtIDNumber.Text & "*'"
So you are using the value of a text box in a form to populate the SQL query. Am I right so far?
And you are asking, what if I store the ID number in a variable rather than a text field? I agree, this is probably a step in the right direction.
So you might create a variable in the "General Declarations" section of the form using:
Dim idNumber As Integer
With the idea being to update the value of that variable each time the text field changes. Note: I am assuming that the "ID number" is an integer -- if not, you should use a String instead.
Now you need to update that variable when the text field changes. In the txtIDNumber_Change event, you will want to add code to convert the string txtIDNumber.Text into an Integer, and store it in idNumber. I forget the exact syntax, but I am guessing something like:
idNumber = Int(txtIDNumber.Text)
Finally, you can now use the idNumber variable in the SQL query rather than the text box:
.RecordSource = "select * from tblpersonal where empid like '" & idNumber & "*'"
Replace Me.lblIDNumber.Caption with varIDNumber
If you have a constant in the label and would prefer for the constant to be stored in a variable instead, create a Const in the form's code. Let's say the label has the text "43" in it.
In the general declarations section of the form, add the code:
Const idNumber As Integer = 43
Then, when constructing the query:
.RecordSource = "select * from tblpersonal where empid like '" & idNumber & "*'"
This will construct the query using the constant 43. I don't really see the point of this -- if you want the employee number to be something the user can type in, see my other answer.
Related
I have form named "frmBond-MuniDetailsAE". It has a combo box named "cboStep". The Row Source for cboSteps is an embedded query that retrieves records from a table named "tblBond-Steps", and it has as Criteria -
[Forms]![frmBond-MuniDetailsAE]![SYM]. This restricts the query to records in tblBond-Steps to only those that have a SYM field that matches that field in the form. This works fine. But I would like to be able to copy and reuse the form for other types of bonds, and I don't want to have to rewrite the embedded query in each copied form. So I wanted to use a variable in the query criteria that would reference the current form.
Following answers given in StackOverflow at How do I reference the current form in an expression in Microsoft Access?, I wrote a Public Function named "FormName()". Here is the function:
Public Function FormName() As String
Dim frmCurrentForm As Form
Set frmCurrentForm = Screen.ActiveForm
FormName = "[Form]![" & frmCurrentForm.Name & "]" & "![SYM]"
End Function
Then in the embedded query for the combo box, I entered "FormName()" as the criteria. Here is the SQL for that query:
SELECT [tblBond-Steps].SYM, [StepDate] & " # " & [Cpn] AS Steps, Format([tblBond-Steps].
[StepCpn],"0.0000%") AS Cpn, [tblBond-Steps].StepDate
FROM [tblBond-Steps]
WHERE ((([tblBond-Steps].SYM)=FormName()))
ORDER BY [tblBond-Steps].StepDate;
But when I open the form with the above query as the Row Source for cboSteps, I get VBA Run-time error '2475': "You entered an expression that requires a form to be the active window."
I can't figure out what I'm doing wrong. Can someone help me?
You must return the value, not the expression:
Public Function FormName() As String
Dim frmCurrentForm As Form
Set frmCurrentForm = Screen.ActiveForm
FormName = frmCurrentForm![SYM].Value
End Function
I would like to know if there is a way to get system username and use it directly in an MS Access query. I have made a parameter work within a query from a combo box on a form and I have also acquired system name in Access VBA using ENVIRON ("USERNAME").
Kindly let me know if this is possible.
You need to create a VBA function that returns the username, and then use the function in the query.
Public Function GetUserName() As String
' GetUserName = Environ("USERNAME")
' Better method, see comment by HansUp
GetUserName = CreateObject("WScript.Network").UserName
End Function
and
SELECT foo FROM bar WHERE myUserName = GetUserName();
My solution kept all the work in VB.
I used a variable for the windows login username and then created a SQL string with that variable inserted. Lastly, I updated the query behind the form to use this new SQL string.
The CHR(34) puts quotes around the name as it is now a string inside the SQLSTR and needs to be within a set of quotes.
If you have a complex SQL statement, write it in the QBE using a string for the name and all the other variables, then switch to the SQL view and replace it using a VBA variable as shown below.
MyName = Environ("username")
sqlstr = "SELECT * From Projects WHERE ( ((Projects.LeadEngineer)=" & Chr(34) & MyName & Chr(34) & " AND ActiveYN = True ));"
Forms![Main Form].RecordSource = sqlstr
You can use SYSTEM_USER if the query is being executed in a SQL Server, that will retrieve the user name connected to the database (for that, make sure you are not using fixed user name in your connection string)
Yes - you can use the 'CurrentUser' function in your query. Here I've included it as a field and criteria.
SELECT Field1, Field2, [CurrentUser] AS UserName FROM Table1 WHERE Field1 = [CurrentUser];
I think this is a simple question, but need help as I am new...so please go easy on me =)
I want to use a variable in the WHERE clause of my query using the Google Visualization API Query Language.
I have a variable called studentId that the user can set using a textbox on the page, and would like to run this query query.setQuery('SELECT B WHERE B = studentId COUNT(B)'); but this query is only checking cells where the actual contents of the cell is "studentId".
Can I pass a variable's value to the where clause of this query? How?
I feel that there should be a simple answer to this but am coming up blank after much searching. Thanks for looking.
Yes, you can use a variable in the query. If studentId is a number, use this:
query.setQuery('SELECT B WHERE B = ' + studentId + ' COUNT(B)');
if it is a string, use this:
query.setQuery('SELECT B WHERE B = "' + studentId + '" COUNT(B)');
Currently I'm working on legacy application, that uses crystal report engine. I have to get value of database fields programmatically. As I've assumed, I need proper event for getting next code to work:
Report.Database.Tables(1).Fields(1).Value
But the value is always empty in DownloadStarted/Finished event handlers. What I'm doing wrong and is it at least possible?
I think that if you want to get value of your table fields in program the best way is that you get the field name from report and then connect to your table directly and use report field names as the table columns name
i do it in c# i hope it can help you in vb6 too:
string name = report2.Database.Tables[1].Fields[1].Name;
string[] names = name.Split('.');
and then add your database to your program and use names like this:
DataTable dt = new DataTable();
string[] value = dt.Columns[names[1]];
if you just need your tables values, you can use my last answer, but if you need value of database fields in crystal report, i mean something like formula field ,this code can help you:
CRAXDRT.FormulaFieldDefinitions definitions = report2.FormulaFields;
string formulaText = "IF " + report2.Database.Tables[1].Fields[3].Name
+ " > 10 THEN" + report2.Database.Tables[1].Fields[2].Name;
definitions.Add("Test", formulaText);
report2.Sections[1].AddFieldObject(definitions[1], 0, 0);
I know that there's something wrong with my syntax... "select * from tblpayroll where empid = userid"
UserID is a variable...
apparently, it's your vb variable.
select * from tblpayroll where empid = '" & userid & "' "
use it this way, and it'll work
The text "select * from tblpayroll where empid = userid" will be sent through exactly as is to the SQL back end, the userid part will not be substituted. So, unless you have a userid column, you'll probably get an error. Even if you do have a userid column, the results won't be what you expect.
What you need to do depends on whether userid is a numeric or string value. For numerics, you can use:
"select * from tblpayroll where empid = " & CStr(userid)
This will first turn the numeric value into a string and check it as-is.
For string values, use:
"select * from tblpayroll where empid = '" & userid & "'"
This will simply surround the string with quotes to ensure a string comparison works. You need to be aware that this is a bad idea if userid has not been sanitised somehow - it may lead to SQL injection attacks. The art of fixing that is outside the scope of this particular question but it's worth keeping in mind.
What to do if your variable is numeric but the database field is a string is another matter. You can do it with CStr and zero-padding but, since it's an unlikely scenario, I haven't documented it here.