I fill a data table with 11 columns and 1 row.
Columns/ User Pass
Row / **User2054** 1234
I have a Label named lblUser and I want to put the value=User2054 from my Table(Collumn[0], Rows[0]). How I can fill it?
I am trying to add NewRow to the database by using datatable in dataset, but before I do that I want to make sure that row is not already there. I create new row for the datatable I am working with, fill it with information. I fill datatable with the row from database that has the same primary key as my NewRow by using tableadapter.fill method, but when I do that my NewRow that was never added to the datatable is filled with information from database(and not information that I assigned to it). I count rows in my datatable before I fill it and it's 0, so why is my NewRow affected by Fill command? (I am using VB.NET 2005 Framework 2.0)
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Is there a simple way to assign a populated datatable's columns to another empty datatable? That is, I want to copy a datatable's structure only but not its data.
View 6 RepliesI have a datatable property called prpParametersTable in a class called clsBatch. I have a procedure that sets a datatable variable called dtP equal to prpParametersTable at the beginning of the procedure. I then add three new columns to dtP.Here is my problem. When I add the three new columns to dtP my original table prpParametersTable also gets those columns added to it, why? I only want to add the three columns to dtP and not prpParametersTable. How can I do that?
Private Function prvfnc_InsertBatchParameters(ByRef cnn As SqlConnection, ByRef trans As SqlTransaction) As String
' set new columns that have BatchID, Insert DateTime, and UserID for the SQLBulkCopy method below
Dim clm As DataColumn
Dim dtP As DataTable = clsBatch.prpParametersTable
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How to fill a listbox with data from a SQL (OLEDB) so that you can see one row of data with various columns to show the different values for that row,ie. all of the SQL statement as one row.[code]...
View 10 RepliesEmployee emp = new Employee();
comHandledBySQt.DataSource = emp.GetDataFromTable("1");
comHandledBySQt.DisplayMember = "FirstName";
The above code displays drop list of employees first names in a combo box. I want first name and last name to be displayed. How can i do it?I tried to include two columns FirstName and LastName as below but didn't work.
comHandledBySQt.DisplayMember = "FirstName" + " " + "LastName";
I can't seem to get a DataTable filled.url...I'm using VB, Visual Studio 2010.I keep getting an error on this line: adapter.Fill(dt)The Microsoft Jet database engine could not find the object 'Book1.txt'.Make sure the object exists and that you spell its name and the path name correctly.The name of the file and the path should be perfectly fine, although i did change the code just a bit:[code]I read somewhere that you have to 'drag a data adapter object from the Toolbox onto a form or component'.I don't have a DataAdapter in my Toolbox.I did a right-click and selected 'Choose Items.It is nowhere on the .NET Framework Components.
View 4 RepliesNow what i want is that when user select some option from the combobox then some of the cells only in the same row get filled automatically according to the selected option.
like if there are 4 fields in grid : emp_id , name , age , salary
and id column is of type combobox then on selecting the particular emp_id from the list , its coressponding name get displayed in the same row and then user can enter the other fields.similarlly when the emp_id get selected in the 2nd row of grid then 2nd row column "name" get filled.
I have created a Datagridview with 4 Columns, EJ: ID, Name, Quantity, other..But i want to fill these 3 Columns from MySQL EJ:[code]but this creates new columns and does not write to the existing, took a while looking for a solution but only find methods like this.
View 1 Repliesi want to fill a Datatable with a Datareader row by row but get an exception because the reader's columns have a different order than the Datatable's columns.
Why and how does a Datatable loads itself with a Datareader correctly, even so it has a column collection with different order?
I need to calculate values for every row so i dont want to load the Datatable completely but row for row. It has 25 columns so i dont want to set it all manually.
There must be a chance to load/fill/add a new row from a datareader without having the same column order(reader.GetSchemaTable?).
Following is what i have but what doesnt work:
Using reader As System.Data.SqlClient.SqlDataReader = command.ExecuteReader
'next line works(configInfo.DataSource is a Datatable)but is inappropriate
configInfo.DataSource.Load(reader)
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I am using a SQL query to fill a datatable from 2 associated tables. The first table has Products and the second has associated addonpackages. When I loop through my Products I am able to get all of the addonpackages for the first product but after that the datatable is only getting populated with the last addonpackage for each product. ie:
product 1 - all 6 packages are added tp the datatable
product 2 - only package 6 is added to the datatable
product 3 - only package 6 is added to the datatable
...and so on
My query follows. Why I am getting all of the info for the first product but just the last item for all others. No matter which product I would query first, I get all of the associated data with it but only the last for all others.
SELECT Products.ProductNumber, Products.Name, Products.Mnemonic, AddOnPackages.PackageNumber,
AddOnPackages.Name AS PackName, AddOnPackages.Mnemonic AS PackMnem
FROM AddOnPackages RIGHT OUTER JOIN
Products ON AddOnPackages.ProductNumber = Products.ProductNumber
WHERE (Products.Name = @ProdName)
ORDER BY Products.ProductNumber, AddOnPackages.PackageNumber
I want to fill a combobox with the values that I have in a datatable. How can I do that? Below is the code for the population of the datatable:
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I would like the main form I am designing in VB.net to appear as quickly as possible. As a result I don't want to fill a datatable in the load event but instead fill it as soon as the form appears, in the background.Then when a user clicks the button a listbox can quickly be populated.
With this in mind I called a function to fill the datable from the _Shown event. The trouble is that the form freezes until the query executes, making the process pointless for my needs.
Does anyone know how to keep the form active while the datatable fills silently in the background?
I have a table like this
col1 col2 col3
a b
c d
I want to fill the 3rd columns.
I'm getting a set of data by a datareader and assigning to a string. Now I need to fill the datatable columns with the Query fields. The datatable is connected to a grid to display the filled data.
query is : strSQL = "SELECT EmpCode,EmpID,EmpName FROM dbo.Employee"
Datatable columns are EmpCode,EmpID,EmpName.
I need to read the query and assigned to the columns of datatable and fill the table.
Me.DtShifts.Tables("NonAllocated").Clear()
Me.DtShifts.Tables("NonAllocated").Load(dr)
i have a datagridview table ("Bookingen") that is bound to an acces datatable
this table ("Bookingen") has columns
an i also have another form that alows people to add info like a registerform
what i would like is that when adding the info by button click
a column with the name of the person from registerform displayes in datagridview ("booking")
this my code so far
Public Class nieuw_personeel_invoer_code_
Private stroledb As String = "SELECT* FROM Loginnummer"
Private strconnection As String = "provider= Microsoft.ACE.OLEDB.12.0; Data Source=D:clifs project21.accdb; persist security Info=false;"
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How can I get a sum for all the columns in a datatable? Say I had the following table. How can I calculate the "total" row? It should be easy to add total row to a datatable.
Columns hits uniques sigups, etc...
Rows
1 12 1 23
2 1 0 5
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I was wondering if there is a way to change the Fill command text of a datatable before issuing it.I need this because the table I am opening has over 15 thousand rows and it hangs for a while in the network when filling the table. So I would like to tell it what to SELECT instead of getting the whole table and then applying a filter.If there's a way of doing that without changing the fill command, it will also work for me.
View 2 RepliesI'm trying to create a Server/Client Sync scenario for my application using Sync Services for ADO.NET specifically the LocalCache custom tool which sets the whole thing up for me.My server DB has 5 Tables, all of which are being synchronized to the client application, which now has a SQL Server Compact DB with the same schema as the server DB. I have a dataset with some custom queries that I use to connect my app with the local database.So far so good.However in my application when I try to fill one of my tables with the table adapter on my form (the default "fill" method) it gives me the following exception:No mapping exists from DbType Object to a known SqlDbType.
However, if I continue and do the fill again, IT WORKS without a problem.
Try
Me.WTSUsersTableAdapter.Fill(Me.WTSMainDataSet.WTSUsers)
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fill a NEW DataSet's DataTable with data from a DataGridView? I am generating a data report that uses that "new DataSet." I need to go from a DataGridView to a DataSet because i need the person to be able to perhaps edit the information before its inserted into the report. my process to generate the report is...
- fill datagridview with advanced join sql
- allow user to edit datagrid if necessary
- put datagrids modified information in new dataset
- set report's databinding source to new dataset
- generate report...
I have a SQL db that holds the records for my page. On my page I have a details view I want to populate with records from my db. I can populate the records just fine, I need to be able to populate in records based on a user selection from a drop box?To clarify, on my main page I have a drop down list with years (ie. 2011, 2010, 2009), and a drop down containing account codes (ie. six-digit numbers). Based on what the user chooses for the year (for example 2010) and the what they choose for the account code (for example 123456) I want to populate the details view (which is on a seperate page) with only those records from 2010 and with the account code 123456??
View 1 Repliesthis is more a theoretical question i asked myself.I remembered that BinarySearch of an ordered List(Collection in general) is faster than finding Rows with Datatable.Rows.Find or DataTable.FindByPK with a primary key value.Hence i fill a Datatable from Database in a shared constructor and immediately after that a List(of Int32) that contains all primary keys from that table. Later i will check with BinarySearch if the List contains primary-key values. But because the datatable contains only the PK-Column anyway, i asked myself if there is a way to avoid the huge overhead of filling a Datatable and after that adding all Rows to a List. Is it possible to fill a generic List(or other collection-type) instead of a Datatable/Dataset directly from a Dataadapter?Maybe i'm off the track and there is another way to avoid the Extra-Loop that i'm missing.
The code of filling the DataTable in a strong typed Dataset and the List:
Private Shared w205CorrectSWUpgrades As New List(Of Int32)
Shared Sub New()
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The following code loops through the rows of a datatable to process each record which has a Processed column value not equal to -1. When a record is processed, its Processed value is updated to -1. As a record is processed, the code within the Do Loop may add a new record to the datatable with a Processed column value equl to 0. All of that works as intended. My test set record gets processed and a new record is added.At the end of the For.Next code, there is a line , "clsWTAdapter.Fill(clsWTDataTable)", which I intended to refresh the rows so that it would include the newly added record which would then be processed during the next iteration of the For...Next sequence. This is not happening. What am I doing wrong, and how can I refresh the rows and process the newly added records?
I found this line in an MSDN page about DbDataAdapter Fill Method (DataTable) at [URL]"The overload of Fill that takes DataTable as a parameter only obtains the first result. Use an overload of Fill that takes DataSet as a parameter to obtain multiple results."Does this mean that I am on the wrong trackby using a datatable where I should be using a dataset? Does "multiple results" mean filling the dataset multiple times like I am trying to do with the datatable?
Using clsCnn As New SqlClient.SqlConnection("Server=REXSQLEXPRESS;Database=dmf;Trusted_Connection=True;")
clsCnn.Open()
Dim clsCmd As New SqlClient.SqlCommand
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I have a datatable that was created with the dataset designer. I have it bound to my datagridview. All the columns are set up the way I want, etc. I am performing a SQL operation at runtime, so I can create SQL statements dynamically rather than creating them with the designer. When I try to fill the existing datatable, I get no results. There is no error, but the data i should be seeing in the DGV is not there. However, if I fill a dataset that is created in code at runtime, and then set table(0) of that dataset as the DGV's datasource, the data displays as it should.
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It seems I've tried a million little variations of this and I keep getting the same error: "The SelectCommand property has not been initialized before calling 'Fill'
Imports System.Data
Imports MySql.Data.MySqlClient
Public Class clsDB
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I use SqlDataAdapter.Fill to retrieve data from a SQL2000 Server, and the datatable is updatable.
Recently, we plan to upgrade to SQL2005, during testing we found that the same statement will return a datatable, which is readonly We need to change the column's readonly property in order to update it.
my Code for fill datatable is :
n1.SelectCommand = New SqlCommand("Select Code from PriceDrystore where AirplanCode = '" & lblAPcode.Text & "' and substring(Code,8,1)='" & lblRoute.Text & "' ", DS)
n1.Fill(z1)result this code = 8 items
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I have a DataTable oDT. oDT is populated from SQL Server with 6 columns including a column "bAAA" of varbinary(200) I have a function fx(ByVal byteArray As Byte()) as String I would like to add a calculated column to oDT something like this:
oDT.Columns.Add("sAAA", GetType(String), fx(bAAA))
'bAAA is not declared
oDT.Columns.Add("sAAA", GetType(String), fx("bAAA".ToArray))
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Since now, I have the following:
vb
Dim x = ( _
(From row In _Obj_DataSet.Tables(TableName).Rows() _
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I currently have a datagridview that is built from a datatable So lets say we have 6 columns
A B C D E G
So the users will select there data from another program and paste into the the table. So lets assume that the data that is pasted is; (the column names are automatically put in)
A B C D E G
123 456 789 101 112 134
So the table will now look like following (I remove the first row because its the same as the column name)
A B C D E G
A B C D E G
123 456 789 101 112 134
My problem is that the users can rearrange thier tables(column index) so lets say user A has the table in this format
A B D E C G
123 456 101 112 789 134
So when they paste into the program, it will look like
A B C D E G
A B D E C G
123 456 101 112 789 134
So now "C" "D" "E" are incorrect and i need to swap those columns to be the same as the column name. I'm not sure how to attack this problem.My thoughts were to paste the data as is, than see what the first row in each column equals.so if it equals "A" assign it an index 0
B 1
C 2
This seems theres too many steps and will slow down the app...