Im working on a project that includes a TableAdapter for filling data. I usually use parameters for queries I create, but what would be the best way to create a query that may have a wildcard without creating a bunch of queries?
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How do I add a wildcard parameter to my query. Im using a mysql database. The following doesn't work:
Dim occCmd As New MySqlCommand("SELECT occupationid,descr FROM occupations WHERE lcase(descr) like '?descr%';", con)
occCmd.Parameters.AddWithValue("?descr", prefixText)
This query fails on a dataset when I add the rating wildcard. The other two are fine but it does not like the %. This works fine if I run the SQL directly on SQL server.
HTML
SELECT Rating, InvDescrption, FullJobNumber, Product
FROM vJobLines
WHERE Product Like ? AND InvDescrption Like ? AND Rating Like The product and InvDescription fields are NvarChar where the Rating is Int32.
I would like to bind a DataGridView to a different LINQ query every time (in order to reuse the same form/DGV for different queries), like this:
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but the "Qry", and the number of comboboxes, and their field names would change every time.
I have a query in a myTableAdapter that ends with WHERE column IN (@S). This works fine when I use myTableAdapter.Fill(dataset.table, "text") but I can't find any way that works to provide multiple text strings such as "text1, text2" for the IN parameter.
View 1 RepliesI have a string qText with the text of a query in it, say qText = "select * from Data". how can I execute it to fill a TableAdapter I have in my form with the resulting data?
View 2 RepliesHere's what I need the query to be like.
CODE:
How can I make this work in the TableAdapter Query Configuration Wizard?
I have a tableadapter where the select query is as follows:
I want to select only those rows where the value of orderno is in the TextBox1.text. How can i do this?
SELECT CustomerID, Orderno, CompanyName, ContactName, ContactTitle, Address, City, Region, PostalCode, Country, Phone, Fax
FROM Customers
i am putting this query in my querybuilder in the table adapter but i need to make the query only return the transaction done today!! i dont know the syntax to get the cuurent date today. this query should work in the tableadapter query configuration wizard!!!
SELECT Trans_ID, Trans_Cash, Trans_Deposit, Trans_Mtc, Trans_Alfa, Trans_Desc, Trans_Delete_Flg, Trans_Date, Trans_User_Name, Trans_Admin_Flg,
Trans_Msg_Cost
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ive been learning Vb.net at uni. Ive never used it before and im finding it a little difficult ( supposed to be easy )i usually code in c++ and MFC Problem I have craeted the database and added all the fields to the form.
View 3 RepliesUnable to create a parameter query using the table adapter wizard to process an access db file. Went online and attempted to create an instance for new adapter with out success, when I click finish the wizard does not like the in the query WHERE (Last_Name LIKE @Last_Name). Also receive a warning that my code contains to many arguments for 'txtLastName.Text' Tried to paste screen
Public Class FindMemberForm
Private Sub FindMemberForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
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What I want to do is be able to active a query for my datagrid by clicking on a button. How would I do that? Would I create the query as part of my tableadapter???
View 4 Repliesi'm asking a lot of question here, because i have finally found a real helpful place to ask,and i have a lot of questions, anyways i made a login system in which i used an access database, everything is working fine, I Added a TableAdapter and made a query with users and there passwords, this is the code i used:
Private Sub OK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OK.Click
I'm trying to bind a datagridview to a tableadapter which contains a query that requires parameters (for the WHERE statement of the query). The datasource is a SQL Server database. When I bind the datagridview in design view, it does not let me choose which tableadapter method I would like to use. The way I've been fixing this is to go into the code behind that form, where Visual Studio puts in some auto-generated code that fills a datatable in the dataset and I change the method that it's using there and put in my parameters. I don't think this is the proper way to do it, however, especially because sometimes that code doesn't even get generated! My other solution is to just programatically bind the datagridview to a datatable which I have filled using the tableadapter. This seems like more work than it should be, though.
View 5 RepliesBanging my head against a wall here. I have a query that looks like this.
SELECT FirstName, LastName, Address
FROM Members
WHERE FirstName LIKE 'JOE%'
That works absolutely fine in query wizard and the DataTablePreview data window. However, when I do this.
SELECT FirstName, LastName, Address
FROM Members
WHERE FirstName LIKE ?
I get nothing when I run the fillby method. If I change the LIKE to =.
SELECT FirstName, LastName, Address
FROM Members
WHERE FirstName = ?
Everything works great. I need to get LIKE working though so I can wildcard search.
I'm using the SQL server OLE db connections if that means anything.
UPDATE
Using the LIKE operator doesn't work at all. When I just swap out = for LIKE. Nothing is returned.
Is is possible to do something like:TextBox1.Text = Replace(TextBox1.Text, ".*", "", 1, , CompareMethod.Text)
View 9 RepliesWhat I want to do is to replace lets say ##test## with Something(test)..I know that I can find ##test## by: (Though don't know whether there's a smarter way)
System.Text.RegularExpressions.Regex.Replace(str, "##Test.*##", "Output")
So basically the problem is to get what the wildcard (.*) is, since thats really what I need to know..
In VB6 I could use an asterisk as a wildcard when searching the object browser. For instance, searching on "c*Report" would find "cFooReport" and "cReport". I can't seem to do the same in VS2008, am I just missing something obvious?
View 1 RepliesI have been trying the following but it returns unexpected results:
Dim xd As XDocument = _
<?xml version="1.0" encoding="utf-8"?>
<root>
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The above result returns both 'element' nodes however it should only return the first where element/subelement@id=1/subsubelement@id=3 However if results.Ancestors. is used it returns the correct 'subelement' and if that line is not included it returns a single 'subsubelement' whih is also correct I don't understand why when mvoing to the 'element' it returns both (I realise both have a subelement with id=1 but I thought each further query would filter out the presvious results)?
I want to write a query that the "where" in the query is a string something like"
Dim query as string= "Name =xxxx and Date > 10 "
Dim t = from book in doc.Descendants("books") Select _
[Name] = book..value, [Date] = book..value....
Where (query)
I build the query string on run time
I have a sql query that set data to a dynamic text box. Can some one explain how i have to make this query
"Update Clientgegevens set Clientnaam = '"
& TextBox("& T.ToString &").Text &
"',
Im currently working on a project to build an application for Windows Mobile 6.I have a SQL query string:
Dim connectionString2 As String = "Data source = " + path + "HC.sdf"
Dim cmdText2 = "SELECT * FROM BigC_Rangsit_0_"
I want to substitute the table name ie. BigC_Rangsit_0_ with a variable which contains the table name.say, during runtime the user selects a table from the dropdown list , that variable should be substituted with the selected table name dynamically in the SELECT statement.
Dim cmdText2 = "SELECT * FROM "selected table name VARiable""
well, I need the right syntax for this.
I have a listbox which users can select from a list if Towns, I want to be able to build a LINQ query based on the selected items in the list e.g.
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I'm need to do the equivalent of a t-sql statement like this using LINQ:
SELECT * FROM mytable WHERE idnumber IN('1', '2', '3')
so in LINQ I have:
Dim _Values as String = "1, 2, 3"
Dim _Query = (From m In mytable Where idnumber = _Values Select m).ToList()
Not sure what to do with _Values to make idnumber evaluate each value in the string.
I'm triying to create a dynamic query to Entity FW (i'm using Self tracking Entities over EF)
This is what i'm doing:
Public Class Specification(Of TEntity As Class)
Private _predicado As Expression(Of Func(Of TEntity, Boolean))
Public Sub New(ByVal columna As String, ByVal condicion As OperadoresComparacion, ByVal valor As Object)
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How do i great dynamic linq query in VB.net?
View 3 RepliesI'm currently trying to loop through an array (two values) and use both values in a query inside the loop Right now my code doesn't work. I'm trying to populate dynamically the "appType" parameter within the "SelectParameters" tags of the SQLDataSource, but this won't work.
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Can we execute any string like "Button1.Text = Value"
Question arises from sql server where we can store a dynamic/static query in a string (varchar) and execute it and it will put the value to the button1.
I have a table called Foo and I have two columns: Lorem and Ipsum, so the scheme of the table is:
Foo(Lorem, IpsumID)
I also have a table called IpsumTypes, which looks like this:
IpsumTypes(IpsumID, IpsumName)
I would like to write a LINQ query which will have the following result:
Headers: Lorem, IpsumName1, IpsumName2, ..., IpsumNamen
Values: Loremi, count(IpsumName1), ..., count(IpsumNamen)
Each row represents a group of Lorem value and the number of each possible IpsumID in the group. New rows can be added to the IpsumTypes table, rows can be deleted too, so I need dynamically generated columns, because at the time of writing the code I'm not aware of the possible values of Ipsum. How can I achieve this? Is there a magical Linq query which solves this problem, or should I get the values from the database and parse them separately, if speed counts?
I am trying to send a query to a device over http with the url:
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What I want to do is retreive this xml file over http and save it with my VB.NET application. To do
that I am trying the following function, and it works to retreive the page source for normal web
sites, but it fails when trying to retreive this particular page.
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I think that the problem is that the code is counting own a present length in the header, which is
not the case for a dynamically created page. (i.e. you dont know the length until you are done) As
such, the code should be written to read the entire reply.