Questions tagged as 'vb.net'

Tagged questions
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Refresh view when selecting a ChekBox

I have the following code and I need that when selecting the CheckBox you enable or disable the DropDown , that should happen instantly every time the CheckBox1
asked by 18.09.2018 / 17:35
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Exact Hours given 2 dates in Visual Basic

Dim sql As String = "SELECT a.*, CAST(DATEDIFF (minute, a.fechaEntrada ,a.fechaSalida)/ 60.0 as decimal (18,2)) %24 as horasTrabajadas from tblasistencia a WHERE a.idClave = '" & empno & "' and a.fechaEntrada BETWEEN '...
asked by 09.10.2018 / 16:03
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Know the name of the first table of an excel sheet in VB.NET by OleDB

good afternoon. I'm connecting to an xlsx excel file using OleDB, I wanted to know, in what way can I know the name of the table in the file. That is to say, every day they send me an excel file where the table changes. Then I to do the queri...
asked by 05.09.2018 / 20:10
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Datagridview delete records by code

Dear I am trying to delete records of two datagridview at the same time by code match, I am loading the records in a datatable both datagridview , The process is as follows: By selecting in the first table the exams that I...
asked by 05.09.2018 / 05:12
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Query LINQ, Group by with Group Join

I have this query in Transact-SQL SELECT t_productospreguntas.d_pregunta, t_productos.d_titulo, t_productosimagenes.d_archivo, t_productosrespuestas.d_respuesta FROM t_productospreguntas INNER JOIN t_productos ON t_productospreguntas.c_usuario...
asked by 04.09.2018 / 03:03
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Data Grid shows no data VB.NET

Hello good night I wanted to ask for help, I have a query to an excel file, which works the connection, but at the time of doing the SELECT * FROM , all the columns appear in the datagridview but the data does not appear ... I wanted to kn...
asked by 05.09.2018 / 22:05
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Use of reports in VB.NET

I have to change the reports from Crystal Report to PDFsharp & MigraDoc, the bad thing is that I can not find documentation regarding the use of queries. For example: -> Crystal Report Protected Sub btnVerFichaDet_Click(ByVal sender...
asked by 06.09.2018 / 07:47
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VB.NET Problems opening a folder

I have a problem opening a folder. I have a windows form with several buttons, 2 specifically perform the same function, check if the folder exists in the specified route, delete it if it exists and create it again. In turn decompress some files...
asked by 31.08.2018 / 23:39
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Detect changes in a window

Can changes be detected in the graphics of a window? I put some images to explain myself better: This image is an area of a program. If that zone changes, for example: I should detect it in some way. I do not need to d...
asked by 21.08.2018 / 12:16
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Signing of assemblies in .NET help please!

I have a problem compiling my solution in Visual Studio 2017 it tells me that I should    Error BC41997 Referenced assembly 'xxx.XXX, Version = 1.0.0.0, Culture = neutral, PublicKeyToken = null' does not have a strong name. xxx.XXX Rutavbc 1...
asked by 31.08.2018 / 15:16