Calculate Database Query Value By Using Math Expression?
Oct 4, 2010
I'm currently develop a monitoring and evaluation database with many indicators
For example: I have two input indicator : car , truck
Input_IndicatorID quantity
Car 3
Truck 2
I'd like to create an output indicator have field: formular. The result of vehicle = car + truck = 5
Output_indicatorID formular
Vehicle Car + truck
I don't now how to parse this string, detect parameter: car, truck to get the answer
I search on Google and find some Math parse like: muParser, bcnet but it just for a string
View 3 Replies
Similar Messages:
Oct 5, 2010
I'm currently develop a monitoring and evaluation database with many indicators
For example: I have two input indicator : car , truck
Input_IndicatorID quantity
Car 3
Truck 2
I'd like to create an output indicator have field: formular. The result of vehicle =
car + truck = 5
Output_indicatorID formular
Vehicle Car + truck
I don't now how to parse this string, detect parameter: car, truck to get the answer
I search on Google and find some Math parse like: muParser, bcnet but it just for a string
View 8 Replies
Jan 6, 2010
In MS Access I can write a query like this (where ClassA, ClassB, etc, are boolean fields):
SELECT [ClassA] Or [ClassB] Or [ClassF] AS HasPrints, EntrySummary.EntrantID, EntrySummary.CompID, EntrySummary.ClassA, EntrySummary.ClassB, EntrySummary.ClassC, EntrySummary.ClassD, EntrySummary.ClassE, EntrySummary.ClassF
FROM EntrySummary;
However that method of deriving a calculated HasPrints value is not acceptable in ASP.NET. How can I rewrite my query in a standard SQL query format?
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Jan 12, 2011
I am using below query to count a particular column data based on single condition.
[code].....
But I have to calculate for 3 more conditions. Is it possible to count based on 3 conditions(i.e. 2001 - 3000,3001 - 4000, 4001 - 5000,>5000) and I want result set for all the conditions?
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Mar 26, 2010
I have the following LINQ query which works correctly:
[Code]....
The following query, however causes an error:
[Code]....
"Could not translate expression 'Table(t_f2f_event).Where(e => ((e.EVT_START_DATE > Invoke(value(System.Func`1[System.Nullable`1[System.DateTime]]))) && (e.EVT_START_DATE < Invoke(value(System.Func`1[System.Nullable`1[System.DateTime]])))))' into SQL
and could not treat it as a local expression."
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Aug 17, 2010
I am new to LINQ to XML in .net(C#, asp.net). I want to know more about Lambda expressions. I am using Lambada expression with the following query.
count = FieldRoot.Element("USER").Element("MM")
.Descendants("MMMS")
.Where(a => a.Attribute("ID").Value == MID)
.SelectMany(b => b.Descendants("ABC")).Count();
how the Lambda expression work specially in case of parameters (in the above case a & b) ? What is the basic concept of parameters in Lambda expression ? Can we use the names of the variables defined outside of the query instead of a & b ? which elements a & b represent in the above case represent ? Can we pass parameters from outside in the query ? If we can pass parameters from outside query then how it will be done? If you give me any other example instead of the above query to understand the concept of parameter in Lambda expression.
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Mar 13, 2011
var query = from emp in dbEmp.Employees join dept in dbEmp.Departments on emp.DeptID equals dept.DeptID where dept.DepartmentName.Contains(this.TextBox1.Text) select new { EmpID = emp.EmpID, EmpName = emp.EmpName, Age = emp.Age, Address = emp.Address, DeptName
= dept.DepartmentName };
if (query==null) Label1.Text = "no results match your search";
GridView1.DataSource = query; GridView1.DataBind();
Everything works in the right way, but the label doesn't show the message when query result returns null. The label can show without condition(querry==null). So how to test if a var query result returns nothing?
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Nov 1, 2010
im using MS-Access database, i tried to add some data to the database from C#. the column datatype is Memo.
From front-end, the user type some text on HTML editor that content to be add to this column, if i enter minimal text then data is adding fine but, if enter 2 or 3page content then im getting error as
[code]....
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Mar 8, 2010
I have a Excel user application which has a user form (named 'Registo') that displays criteria and an image that has been entered in it's corresponding spreadsheet. This works the way it should. There's also the ability to search the spreadsheet via a form (by clicking 'Pesquisar' button) this opens a search form. However, I having a bit of a problem with it. When I try to search for something it basically doesn't do anything at all. It just sits there. So I tried to debug it and I think I'm having a problem with either the JET db engine or somethign with teh query or maybe I don't have the correct reference.
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Feb 6, 2010
Error Type:
Microsoft OLE DB Provider for ODBC Drivers (0x80040E14) [Microsoft][ODBC Microsoft Access Driver] Syntax error (missing operator) in query expression 'id='. /bioskop/pesan.asp, line 13
[Code]....
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Apr 15, 2010
i am new to asp.net i am trying to develop an asp.net application i,e registration form in asp.net as user interface and ms access 2007 database as backend.i am trying to make aconnection to ms access 2007 db and save the data entered by the user in asp.net application.
i have saved my access db 2007 file in 'D drive' and my code in application is:
[code]....
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Jan 14, 2011
I am getting this' Data type mismatch error' when i click on a submit button after tag selection. It was working before but now it is not working. It say there is an error on line 105.[Code]....
View 3 Replies
Mar 19, 2016
As I am learning asp.net . when i try to insert record into msaccess table why it says -
Syntax error (missing operator) in query expression 'user1','cx0437@gmail.com' ,'12312456')'.
As i found the same code at the following link [URL] ....
Code:
protected void Button1_Click(object sender, EventArgs e) {
OleDbConnection con;
try{
using (con = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;" + @"DATA SOURCE=C:Database iershop.mdb")) {
con.Open();
[Code] ....
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Jan 6, 2010
my code is calculate to current rowafter update quantity but other rows don't affect and not calculate i need to calculate all rows i think i need to use for loops but i dont know how to do it
[code]....
[Code]....
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May 17, 2010
By right clicking on my database i created a query in server explorer. But where are this query stored can't find them back. I should aspect that their is a folder query's like there is a folder tables but this isn't the case.
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May 11, 2010
I am using ASP.NET 2008 Visual Basic Language. I tried to create a function that multiply two values from two different tables and get the result presented in a label. The value is retrieved by referring to the primary key after the user selects from a DropDownList which is in another page using sessions.
I tried to build this code in the Load_Page event but it didn't display for me the total.
[Code]....
View 4 Replies
Feb 18, 2011
i have created a program which saves login and logout time for a project.there may be more 2 login for a same project.i need to store the total working time for a particular project from all login/logout time.then for the same date there may be more than one entry.Ex:
Project name: Test
User name:
Login time:
Logout time:
Total Time: logout-login
Date:date of login
this is a format of table in database..more than one user will work for the project.there may more than one entry for a day by different users for same project.i need to put a chart for this table with date in x axis and total working time for that date in y-axis.How to calculate the values for this constraints
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Jan 1, 2013
I am saving users information in Sql Server 2005 Database. The problems are:1. If a user selects 1/Jan/1990 then in the Age column of the database automatically 23 should be saved i.e users age, how do I calculate the age and use it in the query? 2. The format of DateofBirth column is incorrect it should be 1/Jan/1990 inspite of2013-01-01 00:00:00.000. The data type is Datetime
------------------Design is--------------
<form id="form1" runat="server"> <div>
FirstName <asp:TextBox ID="TxtFirstName" runat="server"></asp:TextBox>
<br /> <br /> LastName <asp:TextBox ID="TxtLastName" runat="server"></asp:TextBox>
<br /> <br /> Gender <asp:DropDownList ID="DdlGender" runat="server" Style="top: 105px; left: 80px;
[Code] ....
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Dec 7, 2010
I'm doing projects related to education, and I do not know how display mathematical formula? And Editor or component support Math Equation?. I'm using ASP.NET MVC 2.0 .
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Oct 7, 2012
in my asp.net_vb web there is a text box (textbox1) in which a date is dispalyed from database (eg 21-Mar-2012) in another text box (textbox2) i want to display
if the date is less than 30 Jun then the textbox2 should display 1 Jul+the year of textbox1
if the textbox1 date is greater than 30 Jun the text box2 should display 1 Dec + the year of textbox1
my web is in asp.net and code is in vb
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Feb 15, 2010
Is there any solution in ASP.NET/C# or Jquery for writing math equations as MathML is not very well supported by browsers.
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Oct 13, 2010
how to make the Rounded number ?
Example : 3341.48 to 3342.00
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Dec 21, 2010
I have integer 363 for example.
Any method to make it 360 or 365?
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Jun 3, 2010
I'm having an issue with my ASP.NET RangeValidator controls.
I want to allow users to enter a discount amount, and this amount must be negative (< $0.00). I want to verify that the amount entered in a textbox is a negative value, so I have this in my page markup:
<asp:TextBox ID="tbxDiscount" runat="server" />
<asp:RangeValidator ID="rvDiscount" runat="server" ControlToValidate="tbxDiscount"
MinimumValue="0.0" MaximumValue="0.0" EnableClientScript="true"
ErrorMessage="Please enter a negative value for a discount" />
and I attempt to set the MinimumValue dynamically in my code before the page gets rendered - to the negative equivalent of my item price. So if the item is $69, I want to set the minimum value to - $69:
rvDiscount.MinimumValue = (-1.0m * Price).ToString();
Trouble is: I keep getting this error message:
The maximum value 0.0 cannot be less
than the minimum value -69.00 for
rvDiscount
WTF?!?!??! Where I come from, -69 $ IS less than $0 ...... so what's the problem?
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Aug 8, 2010
I'm having problem in inserting text from a textbox in which user write or copy some text which may contain special characters ( " , . ) etc. If there is any special character it get conflict with CommandText Syntax and generates error in inserting. I want to insert all these characters. How could i do it?
Code:
[code]....
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