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I am developing job portal which displays different jobs stored in a SQL Server database. I am using ASP.NET and HTML.
I have job_title and unique job_id in my database table. I have created a hyperlink for job_title which is retrieved from database. Now I want to display the details of that particular job on a different page by clicking job_title of that job.
I need job_id for that particular job whose details I want to display on next hyper linked page. The reason for not to use job_title instead of job_id is that job_title is not unique, but job_id is.
Please tell me how to accomplish that or if you have another solution?
You include the value in the query string of the URL.
WebForms:
Something like this:
Click here for details
Then in JobDetails.aspx you would get the value in Page_Load like this:
var jobID = Request.QueryString["jobID"];
Note that the value would be a string, so you'd need to parse it to a numeric type in order to properly use it. int.TryParse() can help with that.
MVC:
Something like this:
Click here for details
Then in the Details action you would have a parameter for the id value:
public ActionResult Details(int id)
{
// Code to get job details and return a View
}
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So I am currently trying to create a counsellor appointment booking system using ASP.NET Razor pages. I have 2 models so far, Counsellor and Schedule which have been created as follows:
I am now trying to create a schedule for a counsellor, where the counsellor name is selected from a drop down list containing all counsellors in the database. However, when I try to create the schedule I receive an error saying I cannot insert the value NULL into column Description. So I think it is trying to create a new counsellor object when I try to create the Schedule.
Here is my index.cshtml page and my index.cshtml.cs page for the schedule model
This is my create.cshtml and create.cshtml.cs pages also for schedule model:
Lastly I show the database table designers for both counsellors and schedules:
If anyone can assist, i just want to retrieve counsellor name when creating the schedule.For some reason it is like it is trying to create a new counsellor object so it gives me an error saying i cannot enter the value into the description column.
You can find you are using [Requeired] on public string Description{get;set;} in model Counseller,and you are passing Schedule.Counseller.Description to OnPostAsync in Create page.So when you use
_context.Schedule.Add(Schedule),it will also insert the Counseller,and it will get the error cannot insert the value NULL into column Description.
If you want to add the Counseller when adding the Schedule,you need to set default values of Counseller [Required] properties.
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I work on a small project just to get to understand the mvvm model in C# better.
I work with a Microsoft SQL Server database with three tables: customer, location and address.
Every customer can have one or more locations, and every location has a specific address.
My current thought how to accomplish this:
First insert the customer.
To insert the location, get the highest customer_id and insert the location with the max(customer_id)
Then, to insert the address, get the max(location_id) and insert the address, with the location id
Is there a better way to do this?
I haven't found any tutorial with an example of inserting data into more than one table, especially not using SQL Server.
And my next problem is: what should I bind to my TextBoxes, so that I can insert the content of it?
I thought about having a save button. This button would then execute a method, where I insert the data from the bound TextBoxes. Should I do this with commands, instead of writing a method?
Thanks already!
Sql server has a OUTPUT clause which you can use
something like
INSERT INTO MyTable VALUES({CustomerName})
OUTPUT INSERTED.ID
then you can store the inserted customer's actual ID and do the rest inserts in separate queries.
As for your second question yes you should do it with Command binding to a method in your View model
The most advisable for your situation is to use a transaction.
Example.- https://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqltransaction(v=vs.110).aspx
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In the default asp.net application, I want to access the data of other users. In my database table ASPNETUSERS I have columns such as Id, Email, Password, Gender etc. Now I want to be able to search for a particular Id and get that user's entire details like his/her Email, Password, Gender etc. So how do I do that?
Do I use raw SQL? If so how? (someone on SO mentioned this as a bad idea)
Do I use models or something else? if so how?
This is my ASPNETUSERS Table info. And this is my action in a controller. I want to be able to get an user called "stackoverflow#gmail.com" and send all his details(whatever are there in my table) to the view.
private ApplicationDbContext db = new ApplicationDbContext();
public ActionResult Index(string id = "")
{
//db.someCommand or something to let me get stuff about
//stackoverflow#gmail.com. Could it be db.Database.ExecuteSqlCommand ?
return View("Send All details about my stackoverflow user");
}
Edit: This is what I tried before. I tried to use raw sql and convert it to a string(for testing) and write it to a file on desktop. That way I thought I would at least know that the data in my database is getting passed back to me correctly before I pass it to my view.
This was my line of code that I added just before my action returned.
System.IO.File.WriteAllText(#"C:\Users\Admin\Desktop\log.txt", db.Database.ExecuteSqlCommand("select * from dbo.AspNetUsers").ToString());
I did not get any errors doing so, but I expected my data from the image above to be posted into my file called log.txt on desktop. But I opened log.txt file only to find that "-1" was posted in there.
If you want to get the users from your database, use linq with your ApplicationDBContext object
ApplicationDbContext db = new ApplicationDbContext();
//Manipulate the Where clause to get the conditions you want
IEnumerable<ApplicationUser> users = db.Users.Where(x => x.Email == "stack#overflow.com");
This works with the out of the box ASP.NET individual authentication model (which looks like what you have)
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I have a web service that returns the list of all the clients.
I can get the list into a gridview by calling the method get all data like this.
test.RH_WebServiceService ligar = new test.RH_WebService();
test.baseList[] data = ligar.getAllData();
The thing is I wanted to filter it by name (for example) I've been reading online and people have said to me that I can just do it like this:
test.baseList[] data = ligar.getAllData().Where(condition);
However I can't get it to work. Do you guys have any ideas?
Assuming you are using Linq then you can just do:
test.baseList[] data = ligar.getAllData().Where(d => d.Name == "John");
The d is a random letter given to the object. Name is what i am assuming your property is called. Although i would recommend creating a method in your service that you pass the name in and get back the filtered data. That way you only return data you need which will improve performance. Something like this:
test.baseList[] data = ligar.getDataByName("John");
Maybe this will help some:
test.baseList[] data = ligar.getAllData().Where(f=> f.field == "value").ToArray();
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I want to put check to validate textbox that input value must not be similar to the values already present in database. Like:
if there is value with text "Hello" in database then user must not be allowed to save value either he writes:
Hello
HELLO
hElLo
HeLLO
Hello etc
I followed this http://www.dotnetperls.com/string-isupper-islower but as i am new to c# so have little confuse that how to match above defined words as all are same words Hello
I typically just convert both values (user input and stored value) to lower case when making the comparison.
Edit: if both values are in .NET, you could use String.Compare(s1, s2, StringComparison.OrdinalIgnoreCase)
Do you need to do this in code? I would suggest that you just make a unique constraint on the column and let the database handle that for you. Depending on the database you are using you may need to do a little additional work to handle the case sensitivity.