Getting Number Of Rows In Table To Display In Database
Aug 23, 2009
Any method that can effectively get the total number of rows that is StartRows to EndRows in a database table and then get the corresponding data from that row as currently I am having difficulty in retrieving out the correct row of data to the column that I am comparing. It will always get the first row of data regardless of which row I put in the handphone number which I'm comparing to. The codes below is the one which I am currently using now to detect the maxrows in the database and also to retrieve the corresponding information.
MaxRows = ds2.Tables("CustDetail").Rows.Count
MaxRows = MaxRows - 1
Dim numbers() As Integer
Dim EndAt As Integer
inc = 0
[Code] .....
I used a msgbox(n) to see the number of rows in the database but it displays only one where I have two rows in my database. The for loop is the one which will detect the number of maxrows and also retrieve out the corresponding details. But apparently this is not the appropriate way.
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Sep 25, 2011
I have the following controls:
[Code]....
I have a table on a MYSQL database called "messages" and a column called "message". When i type something into textbox1 and click button1 i want to add a row to "messages" under the column "message" with the title and message as its value.(separated by a hyphen, dash, or other small delimiter)Then reload listbox1's contents to show the new message. so i want the final message to be something like:
[Code]....
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Dec 1, 2009
I have a table from a database and i need to display the total number of record and display it in a label.i already have binding navigator but i will not use to display the total number of record in that table. and i will also make that binding navigator invisible.
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Jul 27, 2010
when populating a data grid i keep getting a redundant row in the bottom. is there a way to lock grid rows to the number of rows in the data table?
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Jan 8, 2012
how do i count the number of rows that are affected when I updated a table, and display the number of affected rows in a message box ??
here is my code for updating the table ...
For Each row As DataGridViewRow In DataGridView1.Rows
req = row.Cells(Column1.Name).Value
If row.Cells("Column1").Value = True Then
[Code].....
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Dec 7, 2010
I would like to select a number of rows from a table and out of those I need away of selecting a column from the last row?
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Oct 6, 2009
i have a Dataset command (DELETE FROM TABLE Where Name =@name)On my winform i have a Delete button that it deletes the rows, next i want to display the number of rows deleted to a msgbox, what i get now is 0this is my code:
Me.NetworkErrorsTableAdapter.Del(par)
MsgBox(" " & Me.NetworkErrorsTableAdapter.Del(par).ToString & " records deleted ")
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Jun 7, 2012
I am using PostgreSQL database with VB.net through ODBC what goes OK. Sample code:
[Code]...
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Apr 22, 2010
For a project i am working on, i am taking bookings. These bookings are stored in a database alongside a users personal details. The personal details are assigned an ID according to the user who booked it. A user can book more than once with different personal details.
My problem is that i want a user to be able to edit a booking. I want a list of all the names that user booked to be listed in a combo box. This is the part i am having trouble with. i am using an access database and using sql statements to pull out the data. This is what i have tried so far:
SELECT [First Name]
FROM PersonalDetails
GROUP BY [First Name], UserID
HAVING (UserID = ?)
If i execute this query in the query editor, it works and shows the two records currently assigned the input id. However, if i try to output this to, for example, a text box, then it remains blank. I am assuming thisis because there is more than one output, but i'm not sure.
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Apr 30, 2009
I am using a tableadapter to connect my project to an MS database. I need a a function which counts the number of rows in the table for something which I am doing. I have sucessfully used the count function to count the number of rows for my other tables, but when I tried to reuse it for another table, it wouldn't work. I get an error...
An unhandled exception of type 'System.ArgumentException' occurred in System.Data.dllAdditional information: Input string was not in a correct format.Couldn't store <AH25> in ProductCode Column. Expected type is Int32.
and this is the code which I used
Dim record As Integer = TAProduct.GetData.Rows
Do Until record = TAProduct.GetData().Count
' other codes
loop
It only seems to work if the first column is an integer datatype, which is the case for my other tables, but the table which I am currently dealing with using a string datatype. Is there another way to count the number of rows without using SQL statements or can I adapt my existing code in some way?
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Sep 12, 2009
I am currently having trouble detecting the number of rows in the table in sql database. I have one column as auto increment, and one column that will show the blkname. But everytime I delete off one row, the program cannot run saying that there is no row at position "up to the latest number". Then, when I try to insert back the row again, the program also gives me the same error. I think the program probably cannot detect the number of rows correctly as it cannot like detect if there is 5 rows in the database and if you delete one row, it will give me the error. The above method is the same if I used the auto increament column and without.
The code that I have wrote so far is :
'AUTOINCREMENT
Dim n As Integer
Dim inc As Integer
Dim numbers() As Integer
Dim StartFrom As Integer
Dim EndAt As Integer
Dim MaxRows As Integer
MaxRows = ds2.Tables("CustDetail").Rows.Count
[Code] .....
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Feb 18, 2009
how to find out the total number of rows in a database through datareader
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Aug 9, 2011
I am trying to append multiple rows in a SQL Server.I have connected to the MS SQL Server and with a DataAdapter, I have downloaded the Table into a DataTable and displayed it in DataGridView.I now want to programatically enter multiple rows into the DataTable and later to update the SQL Table.
I am trying to build an application to do this generically.The problem I have is that the Table and DataTable has an 'ID' Field. In the SQL DB, i is an Auto-incrementing field.When the code loops through creating new rows and entering field values, how do I handle the ID Field that is the Primary Key?
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Sep 26, 2010
i would just like to ask how do i retrieve data rows in my table in my database randomly... i was able to create an online quiz wherein it displays the question,choices in consecutive order but what i want is, every time when user will start a quiz it will show questions in random order. I am using mssql 2005 as my database below is my code.. a
QuizPage.aspx
<asp:DetailsView ID="questionDetails" runat="server" AutoGenerateRows="False"
CellPadding="4" ForeColor="#333333"
GridLines="None" Height="50px" Width="550px">
[code]....
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Mar 1, 2009
Some example code to insert rows of datagridview into a sql express database table? Also, how do I manage concurrency as it is a multi user application?
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Jan 18, 2011
i have a problem to retreive whole rows of a datagridview and transfer to my new access database in vb environment anyone can give me advice or examples of how to do it ? for example my datagridview colums have JOB_NO, ERR_DESC , REMARK
now i would to post all row (not selected datagridrow) from this datagridview to my new database .. i search at google using row count may do the job but i still fail on ...
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May 29, 2012
How do I dynamically display the 'Edit' on the hyperlink field based on the values on the rows, generated from the database. the gridview automatically generates rows.
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Jan 14, 2009
I am using the tutorial posted here for my database testing. I have gotten it to display the data using a messagebox but it just goes through them 1 by one. I want it to display all the data from the database in a table on my form.
Using connection As New SqlClient.SqlConnection("Server=71.200.87.112MySQLExpress; Database=database_test;User ID=sa;Password=greddy6;Trusted_Connection=False;")[cod
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Jan 8, 2010
I'm working on a project and my boss insists I use a DataGrid for this. The grid holds information for work orders, one of the cols has a check box in it. I need the user to be able to select any number of those checkboxes/rows and then return a value to the table "stamping" that users ID. This is what I have so far to get the grids populated... I'm using 2005 with a 2000 Access Database if that helps. Though this will be changed to SQL Server once we get it working (yay more work)...
[code]...
I removed the code from the second grid to make it easier to read, obviously once I can get one to work the second shouldn't be as much trouble.
This is the check box: dgvNewBiz.Columns(1).HeaderText = "Select"At this point if someone knows how to get it to recognize the click event of the check box and pass that row info to a variable that would be super as I'm sure I could probably figure it out from there.
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Jun 21, 2012
I am trying to program a noise reduction algorithm that works with a set of datapoints in a VB.NET DataTable after being helped with my other question. Basically, I want to take two integers, a coordinate value (yCoord for example) and a threshold smoothing value (NoiseThresh), and take the average of the values in the range of (yCoord - NoiseThresh, yCoord + NoiseThresh) and store that number into an array. I'd repeat that process for each column (in this example) and end up with a one-dimensional array of average values. My questions are:
1) Did anything I just say make any sense ;), and
2) Can anyone help me with the code? I've got very little experience working with databases.
[Code]...
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Mar 16, 2011
I am a beginner in ASP.NET using VB Code. I want to generate a Unique reference no by concortinating three column fields.[code]...
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Jan 18, 2012
I am currently using DevExpress 10.2 within Visual Studio 2010. In a previous question I was trying to print the current user view of a DevExpress GridControl with the user's choice of expanded or collapsed master rows and/or group sections. I was told this was not possible at this time. I have now decided to use the following code:
[Code]...
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Aug 18, 2011
I have Dataset ds filled up with values Until now I was displaying values in GridView. Now I want that all the rows should be columns and columns should be rows.I have 2 options: Either 1 I can directly convert grid to columns and display it, or 2 I can convert the GridView to html and then write loops to convert. I was trying the 2nd option but I cant figure out how I should do that.[code]With this code I am still getting same as GridView. Please help me for converting rows to columns and vice versa.
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May 25, 2009
i have combobox to display name form database table..but it is not showing in ascending order..how do i do that?
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Aug 5, 2009
I am trying to display the content of the text box according the number of records in the database. When i do it manually it works but when i do it through the "for" loop i am confused. my code is as below
For i = 0 To total_rec
fname1.Text = ds.Tables("roster").Rows(total_rec).Item("FirstName")
lname1.Text = ds.Tables("roster").Rows(total_rec).Item("LastName")
Next
Now i want to change the index of "fname1" some thing like "fname(total_rec)" but it does not work
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Apr 11, 2011
I've found a sql string like: "SELECT Count(*) FROM table"My question is: how can I use this string and get the result into a variable in VB2010? I used to program with VB6 for years, but now things are very different.
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Apr 22, 2009
columns are like enroll_no,emp_id,first_name,department etc etc..i want to display all records of table into my listview....how to do that?
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Feb 23, 2010
how to use a dynamic table for my MS SQL database? Im using vb.net 2008...any idea on how to do it?
e.g. - Output
ID LastName FirstName Address Order
001 Doe John Kentucky 10-10
002 Smith Jack Kansas 10-11
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Feb 2, 2012
How to load data from database table and display in datagrid in VB.NET? I know how it is in C#. I am not familiar with vb.net.
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Jul 28, 2010
I am trying to display in my richtextbox1 a text from a table in my database according to some conditions that I decide by filtering. I worte a code for this but I think I am making a mistake because it gives errors all the time with Richtextbox (it does not accept datasource). Could you please help me on this?
Here is the code I have:
Dim dtCOP As New AmetailorDataSet.COPDataTable
Dim adapterCOP As New AmetailorDataSetTableAdapters.COPTableAdapter
adapterCOP.Fill(dtCOP)
[Code]....
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