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Found 2 results

  1. How i can filter List the data with Dictionary condition using linq. class Person { public string name { get; set; } public string subject { get; set; } public string type { get; set; } public int age { get; set; } } class Test { public void FindData() { // Create dictionary and add five keys and values. var conditionDictionary = new Dictionary<string, string>(); conditionDictionary.Add("subject", "english"); conditionDictionary.Add("type", "teacher"); List<Person> persons = new List<Person>(); persons.Add(new Person { name = "Rajul", subject = "math", type = "teacher", age = 20 }); persons.Add(new Person { name = "Jhon", subject = "english", type = "teacher", age = 25 }); persons.Add(new Person { name = "Nitin", subject = "english", type = "student", age = 21 }); persons.Add(new Person { name = "Sumit", subject = "english", type = "teacher", age = 26 }); persons.Add(new Person { name = "Komal", subject = "science", type = "student", age = 29 }); List<Person> filteredpersons = Filter(persons, conditionDictionary); } public List<Person> Filter(List<Person> persons, Dictionary<string, string> conditionDictionary) { /*TODO: can you suggest how to filter list data using linq with Distionary*/ var list = (from person in persons from condition in conditionDictionary select person).ToList(); return list; } }
  2. Hello,I am working on my final project for school and I have to post certain form tasks to the database. I am not all that sharp on every aspect of data connections yet and am struggling. I am using the connection that visual studio creates when you drag and drop the table on the form. It is all working great when I do things by my book, but my teacher asked us to insert something into the data base and I cannot figure out that part. I was looking at an article online about saving something to the database, but it was creating a new object of the class for a specific table and they did not have a visual of the class. I started fumbling my way through that and it was not going too well. I need some more specific help because I am not educated enough yet to figure this out in the time frame I have. Here is part of my code. I want to insert the info in the fields into the database once it passes the test. The test works fine. private void regSubmitButton_Click(object sender, EventArgs e){byte use = Convert.ToByte(userIDBox.Text); string pass = passBox.Text; this.lib_UserTableAdapter.Fill(this.libraryProjDataSet.Lib_User); var match = from u in this.libraryProjDataSet.Lib_User where (u.User_ID == use) select u.User_ID; var match3 = from u in this.libraryProjDataSet.Lib_User where (u.Password == pass) select u.Password; try{ if (match.Count() != 0 || match3.Count() != 0){userIDBox.Text = " ";passBox.Text = " ";errorUlabel.Visible = true;}else{mainPage MainPage = new mainPage();MainPage.Show(); }
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