If you are using an identity column on your SQL Server tables, you can set the next insert value to whatever value you want. An example is if you wanted to start numbering your ID column at 1000 instead of 1. It would be wise to first check what the current identify value is. We […]
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var query = from c in context.Customers select c; if (name != null) query = query.Where ( customer => customer.Name == name ); if (contactName != null) query = query.Where ( customer => customer.ContactName == contactName ); This way we can pass different combinations of arguments to the method and it will still build the […]
Starting from a simple query from Northwind Database; var query = from c in ctx.Customers where c.City == “London” select c; The query that will be sent to the database will be: SELECT CustomerID, CompanyName, … FROM dbo.Customers WHERE City = [London] There are some ways to write a Linq query that results in using […]
Usually when creating a database table, you will tend to add “default values” to some columns (Guid, Dates, …). BEGIN ALTER TABLE [dbo].[User] ADD DEFAULT (getdate()) FOR [Created] END Adding the table to a DBML file under visual studio will ‘by default’ disallow the default value in the table. The mapping with default values will […]
This message is raised when you try to insert values in an identity column. Identity columns are auto incremented by the system and thus, does not allow manual modifications/insertions. To resolve this error, you have to set the Column_Identity ON by using the following syntax. SET IDENTITY_INSERT tblXYZ ON — your insert statement here SET […]
xyzDataContext dc = new xyzDataContext(); AutoCompleteStringCollection namesCollection = new AutoCompleteStringCollection(); var query = from c in dc.Clients select c.Company; foreach (String comp in query) { namesCollection.Add(comp); } tBoxCompany.AutoCompleteSource = AutoCompleteSource.CustomSource; tBoxCompany.AutoCompleteMode = AutoCompleteMode.SuggestAppend; tBoxCompany.AutoCompleteCustomSource = namesCollection; Result => AutoCompleteMode accept thoose values : External link : AutoComplete TextBox In WinForms AutoComplete TextBox in C#
LINQ to SQL translates LINQ queries to SQL for execution on a database. The results are strongly typed IEnumerable. Because these objects are ordinary common language runtime (CLR) objects, ordinary object data binding can be used to display the results. On the other hand, sorting and change operations (inserts, updates, and deletes) require additional steps. […]
Libraries for accessing a SFTP server (FTP over SSH) using C# are not included in the framework ((not yet?)). Anyway, some snippets or libraries are available for free on the internet. I will list two of them : – SharpSSH SharpSSH is quite a good library, standalone, that implement the jsch library. – SFTP using […]
Using this code will allow you to configure your application to start or to display following a system wakeup event. /// <summary> /// This function starts running an application when a specified event occurs. /// </summary> /// <param name=”application”>The application. eg: @”\Program Files\testapp\testapp.exe”</param> /// <param name=”notificationEvent”>Event at which the application is to be started. Use […]