Cannot Edit And Delete Record When I Change Primary Key To String

May 17, 2012

The coding will works if the data type of my primary key is integer.but when i try to change the primary key in string data type i cant delete oe edit. below is my coding for that 2 button that is working.[code]..

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I have created simple database project, using vb.net, ado.net, oledb, datatable, datagridview.My program is working nice, I just need Help with how to add, delete, update and edit records.

[Code]...

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[Code]...

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can any one re-edit this query to delete whole record from table1 using username from gridview cell 4 ... ?

Imports System.Data.SqlClient
Dim con As New SqlConnection
Dim cmd As New SqlCommand

[code]....

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I have created a project that has an add a new record, edit record and a search form, that has multiple text, combo boxes and is working great.Last nite I have added a checkbox under my add new record form and i am saving the checkbox value to my database, so far so good. I would like to be able to search any record that is mark with a checkbox to show up in my search screen when I do a search: [code] The problem that i am having is that now that I have added the code to my project to search for the checkbox field in the search screen and if I leave everything blank and click on the the search button I get no record found. I expected to see all that data, since I have nothing selected. Now if I click my checkbox, as soon as I click on my search button I see that two records that I have added for my test.

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IDE :: Getting A Record From Its Primary Key Value?

Apr 26, 2010

I m trying to make a simeple project in visual basic 2005 using visual studio 2005 sp1.

For isolating the problem i have just created project with a single form.

The form contains a masked text box (mask allows numeric(5 digits) int32 value )and a button named FIND.

Then i clicked on add a new data source wizard and added a data source (Microsoft.Jet.OLEDB.4.0 provider) and a microsoft access database (Library Management Project.mdb) . the database has a 5 digit primary key column named -BOOK_ID

i selected no when asked whether i want to add the local database to the output directory and modify connection.

then selected yes when asked whether i want to save the connection string.

then selected everythng when asked what database objects i want to add to dataset.

What i want the project to do when a person enters 5 digit integer value in masked text box and clicks the button FIND

a message should be displayed telling whether this value matches any of the primary key values.

so i wrote under the button click event

Dim DataRow As Library_Management_ProjectDataSet.BookDetailsRow

datarow = Library_Management_ProjectDataSet.BookDetails.newBookDetailsRow

i get an error saying "Reference to a non-shared member requires an object reference.

the msdn library says above two lines shldnt give error.

I m not able to solve this.

However i have not added anything other than masked text box and a button to the form. DO i have to add dataset to the form also ??

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I've been using the following method to store the primary key value of whatever record is being referenced. I would then call the Content.Id method to retrieve that value for sql commands.

My question is - is this good practice? One other told me I should make a session item instead.

This is my ContentDA class

Public Shared Property Id() As Integer
Get
Return _ContentId

[Code].....

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How To Delete Rows Of Data Without Using The Primary Key

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how to delete rows of data without using the primary key VB.netI am using Access 2003 & VB 2005

Private Sub BtnDel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnDel.Click
Dim dt As New DataTable

[code]......

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How To Reset Primary Key After Delete Oldeb

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Dim NewConn As New OleDbConnection(strConn)
NewConn.Open()
Dim dlt1 As New OleDbCommand("DELETE * FROM Invoice ", NewConn)

[code]....

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[code]...

As you can see from the above code, that most of the textboxes are cleared so that a enduser can insert his or her values and information. Currently, I do have the OrderNumber which is the primary key cleared, however, I would rather have this field auto incremented to the next digit. For some reason, at the moment, I just do not know where to begin to set this field so that a digit canbe inserted and incremented rather than cleared.

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I have a javascript file that contains the function for calling the confirmation delete window, the code used is similar to the following:

function Delete()
{
confirm('Delete this user');

[code].....

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[Code]...

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Below is the code that i am using....

For Each DNSZone As ManagementObject In mgrZones
mngrZones = DNSZone.GetMethodParameters("ChangeZoneType")
mngrZones("ZoneType") = System.Convert.ToUInt32(zoneType)

[code]....

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I cannot understand this error fr the related record really existe on the FORN_NIB table. It is even picked up from there. Here's the code where the error occurs at the .Update instruction:

HTML With rst
.Open("DADOS_RECIBOS", conn, ADODB.CursorTypeEnum.adOpenDynamic, ADODB.LockTypeEnum.adLockOptimistic)
.AddNew()
.Fields("NUM_FORN").Value = Me.TextBox1.Text

[Code]...

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