vb.net

问题 How do I check the Tag property of all the TextBox controls in an array? I want something like this: If textBox.Tag And textbox2.Tag And textbox21.Tag And textbox22.Tag And textbox23.Tag And textbox24.Tag = "2" Then This is my array of TextBoxes: Dim allTextboxes() As TextBox = {textBox, narNaslov, narPersona, narDani, narPersona2, kupIme, kupAdresa, kupKontakt, uvBroj, uvDatum, uvIznos, uvAvans, uvRok, uvNacin, datumTbox} 回答1: You can use the LINQ All()-Method If allTextBoxes.All(Function(t)

问题 While I am Debugging whenever I click Break All Button it opens a new tab window which says this: Source Not Available -source information is missing from the debug information for this module It works fine Edit and continue while debugging but why does the above happen? I don't want this tab window to be displayed every time I click Break All. Just don't say It's a Microsoft new Bug! Does anyone have an Idea how to fix that because It's annoying. Thanks! 回答1: It means that at the time you

问题 I would like to convert a Nullable(Of Byte)() array (a.k.a. byte?[] ) to a non-nullable array of the same type, that is, from byte?[] to byte[] . I'm looking for the simpler, easier, faster generic solution, in C# or VB.NET. I've found this generic function to convert between nullable types but I can't find a way to adapt the conversion logic to convert from a nullable type to a non-nullable type. This is a code example for which I feel the need to perform that kind of conversion: byte?[]

问题 For this enumeration, Enum MyEnum Value End Enum there are two methods to get the name representation Value of MyEnum.Value : [Enum].GetName(GetType(MyEnum), MyEnum.Value) ' aka Enum.GetName and Dim a As MyEnum = MyEnum.Value a.ToString ' aka Enum.ToString What are their pros and cons? And which is better after all? PS: There is one answer for java but this is .NET which may have different functionality. 回答1: Here are some examples of what can be done using this enum, note the usage of the

问题 For this enumeration, Enum MyEnum Value End Enum there are two methods to get the name representation Value of MyEnum.Value : [Enum].GetName(GetType(MyEnum), MyEnum.Value) ' aka Enum.GetName and Dim a As MyEnum = MyEnum.Value a.ToString ' aka Enum.ToString What are their pros and cons? And which is better after all? PS: There is one answer for java but this is .NET which may have different functionality. 回答1: Here are some examples of what can be done using this enum, note the usage of the

问题 Does VB.Net have an equivealent for c#'s yield break ? Public Function Validate(validationContext As ValidationContext) As IEnumerable(Of ValidationResult) Implements IValidatableObject.Validate '' what is equivalent to C#'s - yield break; End Function 回答1: Yield exists in vb.net, as you can see in msdn And you'll even find information on yield break : You can use an Exit Function or Return statement (Visual Basic) or yield break statement (C#) to end the iteration. 来源： https://stackoverflow

问题 I have written this function to auto correct gender to M or F from different values in a string array. It works fine but my manager told me to use Dictionary which he said is more efficient. But I have no idea. Anyone like to help me to understand how this can be done ? Thanks. Public Function AutoGender(ByVal dt As DataTable) As DataTable Dim Gender As String = "" Dim Mkeywords() As String = {"boy", "boys", "male", "man", "m", "men", "guy"} Dim Fkeywords() As String = {"girl", "girls",

问题 so my question is relatively simple, can I create VB6 application that references a class in a dll, and then substitute that dll for another at runtime? Now my intial guess is... no chance in VB6. So my thoughts turned to a VB.net interop dll. Could I do it in here, and then call the interop dll from the VB? Again, my guess would be no.... but I'd be happy if someone knew differently. The only thing that I think would actually work would be DI in .Net, but I'm limited to .net 2, or 3.5 at a

问题 I have an encrypted database using "SQLite Cipher" . When I try to connect to the database using Connection string the following error message appears: 'SQL logic error Cannot use "Password" connection string property: library was not built with encryption support.' Imports System.Data.SQLite Public Class frm_projects Dim dtset As New SQLiteConnection("Data Source=Setting.db;Password=m;") Private Sub frm_projects_Load(sender As Object, e As EventArgs) Handles MyBase.Load Try If dtset.State =

问题 I have an encrypted database using "SQLite Cipher" . When I try to connect to the database using Connection string the following error message appears: 'SQL logic error Cannot use "Password" connection string property: library was not built with encryption support.' Imports System.Data.SQLite Public Class frm_projects Dim dtset As New SQLiteConnection("Data Source=Setting.db;Password=m;") Private Sub frm_projects_Load(sender As Object, e As EventArgs) Handles MyBase.Load Try If dtset.State =