vb.net-2010 | 易学教程

Insert text from a text box into and Access 2010 DataBase using VB.Net

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问题 I have 3 text boxes I am using as a contact form. I am trying to use VB to take this data and add it into my database. I have run debugging and it says the error is in the INSERT INTO string. ![Screen Grab of Debugging] [1]: http://i.stack.imgur.com/ufYPs.png Any ideas? Imports System Imports System.Data Imports System.Data.OleDb Partial Class Contact Inherits System.Web.UI.Page Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click Dim Name As String = txtName

runtime error project source code not found and invalid string null exception? [closed]

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问题 Closed . This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 3 years ago . My code was running and i compiled and executed many times in 3days but suddenly error appears sourrce code not found i resolved it by installing extension of source code assembly but still there is 1 error even i have removed connection string class but still runtime error while starting a project

Parse boolean value to Yes/No in datagridview of vb.net windows forms application

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问题 I'm there is a gridview on a form of my windows forms application. it gets it's value from a data source. the datasource contains a field "IsNew". this shows "True" or "False" in a column of my datagridview. I want to show "Yes" for True and No for False. Is it possible? Please Help. 回答1: if you have a SELECT statement maybe you may try a DECODE; for MS SQL it should be: SELECT CASE WHEN FieldA = 'A' THEN 'myA' ELSE 'myB' FROM myTable. 来源： https://stackoverflow.com/questions/13322430/parse

Deploying asp.net application(.Net4.0) package on to IIS 6.0

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问题 I have created a asp.net application project in Visual Studio 2010 (.net 4.0). I had published it using Project-> Build Deployment Package. It generated .zip file along with files having extension " .deply.cmd", ".SetParameters.xml", ".SourceManifest.xml" and readme.txt, in Application (obj\Release\Package) folder My intension is to host the package on test server which has IIS6.0, Windows Server 2003 R2 x64 Edition service pack 2. It has .net 4.0. I tried by running the cmd file but its

How to set default values for data bound controls for addition in VB.NET

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问题 I have a vb.net 2010 form with 22 data bound controls from two tables held in a dataset which is navigated by a bindingnavigator. This successfully adds deletes and updates. However what I need is when adding a new record I need some of the fields to be pre filled out. More specifically I have points balance fields etc which could be any value but will normally be 0 on a new customer so I want to initialise them to 0 when adding new records. I located an AddingNew event on my datasource but

Replace / Remove String between two characters

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问题 I started to create a code (in VB.NET) to extract information from texts; The thing that I could not find in StackOverflow and search engines is an example of replacing/removing the text between "<" and ">" Probably it is REPLACE or REGEX ; I tried both, but could not figure it out; Can I get some help.... Much appreciated... Public Class Form1 Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click Dim SSSS = Replace(Label1.Text, "<td>", vbNewLine, 1, ,

Edit a view in Runtime

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问题 I'm developing a website with ASP MVC 3 and Razor in VS2010 SP1. When I'm running the site from VS, if the view was open in the IDE, I can edit a view in runtime, and press F5 to show the changes, but if I open the view after run the site, then the view is locked (no message, simply I can write in the VS Editor) When I stop debuggin the solution, the views that are locked remains locked, and I have to close the file and open id again in order to modify the code. This behaviour is

Checkbox events when Form is opened and closed fire when form is reloaded

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First... I am open to skinning this cat a different way if I am going at it wrong to begin with. Using VB 2010 .net 4.0 and I am very much a beginner. I am making a product billing application that has a main form and a subform with additional options. Whenever that subform is reopened after being opened once, the checkbox events that were selected are blank by default. If I recheck them (so someone can uncheck) then any that are rechecked all refire and increase the variable again. I ultimately need to be able to open that second form after closing it, display any checkboxes that were

Has Object in VB 2010 received the same optimalization as dynamic in C# 4.0?

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问题 Some people have argued that the C# 4.0 feature introduced with the dynamic keyword is the same as the "everything is an Object" feature of VB. However, any call on a dynamic variable will be translated into a delegate once and from then on, the delegate will be called. In VB, when using Object , no caching is applied and each call on a non-typed method involves a whole lot of under-the-hood reflection, sometimes totaling a whopping 400-fold performance penalty. Have the dynamic type delegate

Make Picturebox transparent over other picturebox?

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问题 I have two Picturebox and both should be transparent background, but the real problem is both transparent for form background but not over each other . here's photo of my problem: http://www.saj-sa.com/problem.gif 回答1: Picturebox1.visible = true \\ will turn on a box Picture box.visible = false \\ will turn a box off Place both boxes over one another then turn on the one you want to be seen, and off the one you do not want to see, reverse the order to switch between them. 回答2: Me.Picturebox2