The first part of this works correctly, when the Textbox value is null. It throws an exception however, when i try to filter search using the second part of the if statement.
The reason the table var is set that way is because the user has the option to load different tables.
The textbox string is the search parameter.
Public Class form1
Dim con As OleDbConnection = New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source= .\Service.accdb ;")
Dim da As New OleDbDataAdapter
Private Sub getdata()
Me.Refresh()
Dim dt As New DataTable
Dim cmd As New OleDbCommand
Dim table As String = ComboBox1.Text.ToString
Dim txt As String = TextBox1.Text.ToString
If TextBox1.Text = Nothing Then
con.Open()
da.SelectCommand = New OleDbCommand("select * from [" & table & "] ;", con)
con.Close()
Else
con.Open()
da.SelectCommand = New OleDbCommand("select * from [" & table & "] where (External like '%" & txt & "%' or Internal like '%" & txt & "%' or Code like '%" & txt & "%');", con)
con.Close()
End If
Try
da.Fill(dt)
Catch ex As Exception
MsgBox(ex.ToString)
End Try
DataGridView1.DataSource = dt
End Sub
End Class
Any help would be appreciated.
EDIT
It seems that this bit of code is stopping it from searching correctly, however without it i cannot save to the DB..
Dim builder As OleDbCommandBuilder = New OleDbCommandBuilder(da)
builder.QuotePrefix = "["
builder.QuoteSuffix = "]"
So i am assuming i am missing a paramter from this section?
Related
Trying to update the values of Comment and ProgressValue inside a table in access. The message box at the end pops up but none of the values are changed.
Sub UpdateWeeklyReport()
Dim con As OleDbConnection
Dim com As OleDbCommand
con = New OleDbConnection("provider=microsoft.jet.oledb.4.0;data source=C:\ProjectDatabase.mdb")
com = New OleDbCommand("Update WeeklyReport Set Comment = #Comment, ProgressValue = #ProgressValue Where [EntryDate]='" & CBDate.SelectedValue.ToString & "' AND [AdminNo]=" & CBAdmin.SelectedValue & " AND [ClassCode]='" & CBClass.SelectedItem.ToString & "'", con)
con.Open()
com.Parameters.Add("#Comment", OleDbType.LongVarChar).Value = txtComment.Text
com.Parameters.Add("#ProgressValue", OleDbType.Integer).Value = CBProgress.Text
com.ExecuteNonQuery()
con.Close()
MessageBox.Show("Report Changed")
intialconnection()
End Sub
End Class
This is my code for search in access database 2010. My problem is that when I search between two datetimepicker the result is wrong in datagridview, I mean when I search from specific records between May and June it shows me records also from February.
Private Sub Search_Record()
Dim conn As New OleDbConnection
Dim cmd As New OleDbCommand
Dim da As New OleDbDataAdapter
Dim dt As New DataTable
Dim sSQL As String = String.Empty
Dim bookdetials As New frmContactDetails
Try
'get connection string declared in the Module1.vb and assing it to conn variable
conn = New OleDbConnection(Get_Constring)
conn.Open()
cmd.Connection = conn
cmd.CommandType = CommandType.Text
sSQL = "SELECT contact_id, first_name , birth_date, book_num, send_from, no_answer, no_answer_by, rec, book_answer_name, book_answer_num, send_date, send_to, project_name FROM tblAddressBook"
If CheckBox1.Checked = True Then
sSQL = sSQL & " where project_name like '%" & Me.TextBox2.Text & "%' " & _
" AND birth_date between '" & DateTimePicker1.Text & "' AND '" & DateTimePicker2.Text & "'"
End If
cmd.CommandText = sSQL
da.SelectCommand = cmd
da.Fill(dt)
Me.dtgResult.DataSource = dt
Label4.Text = dt.Rows.Count
Catch ex As Exception
MsgBox(ErrorToString)
Finally
conn.Close()
End Try
End Sub
datepicker text should be converted to datetime format in sql
I had the same problem, the solution was too silly but it worked
use text instead of datetime in the db
make sure the datetimepicker enters "short format" data
I have this code i wrote to find out if a record exists in data base. It works well when record is found. If it isn't, it brings up an error. I would like the error to be caught in a messagebox that states "record not found" instead.
Dim findprinc As String = TextBox1.Text.Substring(0, 16)
MsgBox(findprinc)
sql = "Select RealID from Dets where ID like '%" & findprinc & "%'"
MsgBox(sql)
Dim conn As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Persist Security Info=false; Data Source=..\new.mdb")
conn.Open()
Dim cmd As New OleDbCommand(sql, conn)
Dim numeri As OleDbDataReader = cmd.ExecuteReader
numeri.Read()
Dim findprinc As String = TextBox1.Text.Substring(0, 16)
MsgBox(findprinc)
Sql = "Select RealID from Dets where ID like '%" & findprinc & "%'"
MsgBox(Sql)
Dim conn As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0; Persist Security Info=false; Data Source=..\new.mdb")
conn.Open()
Dim cmd As New OleDbCommand(Sql, conn)
Dim numeri As OleDbDataReader = cmd.ExecuteReader
Dim recordFound As Boolean = False
While numeri.Read
recordFound = True
End While
If recordFound = False Then
MsgBox("Record Not Found")
End If
I am creating a pageant scoring system,
I have this functions for populating my datagridview's first column using query:
Public Sub searchContestant()
If comboCategory.SelectedIndex <> 0 Then
Dim id As Integer = Login.JudgeBindingSource1.Current("Cont_id")
Dim critID As Integer = Convert.ToInt32(lblID.Text)
'search the contest record by the contest_id
Dim con As New SqlConnection
Dim reader As SqlDataReader
Dim reader2 As SqlDataReader
Dim dt = New DataTable()
Dim nc As New DataGridViewTextBoxColumn
DataGridView1.Columns.Clear()
DataGridView1.Rows.Clear()
Try
con.ConnectionString = "Data Source=BROWNIE\SQLEXPRESS;Initial Catalog=PSS;Integrated Security=True"
Dim cmd As New SqlCommand("SELECT * from Criteria where Cat_id = '" & critID & "' ", con)
Dim cmd2 As New SqlCommand("SELECT * from Contestant where Cont_id = '" & id.ToString() & "' ", con)
con.Open()
' Execute Query
reader = cmd.ExecuteReader()
nc.Name = "Contestants"
nc.Width = 250
nc.ReadOnly = True
DataGridView1.Columns.Add(nc)
While reader.Read()
nc = New DataGridViewTextBoxColumn
nc.Name = "(" & reader.GetString(2) & "%)" & reader.GetString(1)
nc.HeaderText = "(" & reader.GetString(2) & "%)" & reader.GetString(1)
nc.Width = 150
DataGridView1.Columns.Add(nc)
End While
Catch ex As Exception
MessageBox.Show("Error while connecting to SQL Server." & ex.Message)
Finally
con.Close() 'Whether there is error or not. Close the connection. '
End Try
Try
'populate contestant rows
con.ConnectionString = "Data Source=BROWNIE\SQLEXPRESS;Initial Catalog=PSS;Integrated Security=True"
Dim cmd2 As New SqlCommand("SELECT * from Contestant where Cont_id = '" & id.ToString() & "' ", con)
con.Open()
reader2 = cmd2.ExecuteReader()
While reader2.Read()
nc = New DataGridViewTextBoxColumn
nc.Width = 100
DataGridView1.Rows.Add(reader2.GetString(2).ToString())
End While
Catch ex As Exception
MessageBox.Show("Error while connecting to SQL Server." & ex.Message)
Finally
con.Close() 'Whether there is error or not. Close the connection. '
End Try
End If
End Sub
And for succeeding columns :
Public Sub searchCriteria()
Dim con As New SqlConnection
Dim reader4 As SqlDataReader
Dim dt = New DataTable()
Dim nc As New DataGridViewTextBoxColumn
DataGridView1.Columns.Clear()
Try
'populate Criteria
con.ConnectionString = "Data Source=BROWNIE\SQLEXPRESS;Initial Catalog=PSS;Integrated Security=True"
Dim cmd As New SqlCommand("SELECT * from Criteria where Cat_id = '" & lblID.Text & "' ", con)
con.Open()
reader4 = cmd.ExecuteReader
While reader4.Read
nc = New DataGridViewTextBoxColumn
nc.Name = reader4.GetString(1).ToString & Chr(13) & reader4.GetString(2).ToString & "%"
nc.Width = 100
DataGridView1.Columns.Add(nc)
End While
Catch ex As Exception
MessageBox.Show("Error while connecting to SQL Server." & ex.Message)
Finally
con.Close() 'Whether there is error or not. Close the connection. '
End Try
End Sub
This is the output:
And everytime a judge login, I insert data into the system with this function:
Public Sub makeTransaction()
Dim con2 As New SqlConnection
'get the judge id upon logging in
Dim judgeID = Login.JudgeBindingSource1.Current("Judge_id")
'get the contest id of the judge
Me.JudgeTableAdapter.FillByJudgeID(Me.PSSDataSet.Judge, judgeID)
Dim JudgeContestid = Login.JudgeBindingSource1.Current("Cont_id")
Me.ContestantTableAdapter.FillByContestID(Me.PSSDataSet.Contestant, JudgeContestid)
'get the contestant id
Me.ContestTableAdapter.FillByContestID(Me.PSSDataSet.Contest, JudgeContestid)
Dim contestID As Integer = ContestBindingSource.Current("Cont_id")
'get the category of the contest
Me.CategoryTableAdapter.FillByContestID(Me.PSSDataSet.Category, Convert.ToInt32(contestID))
For Each Category As DataRow In Me.PSSDataSet.Category.Rows
Me.CriteriaTableAdapter.FillByCategoryID(Me.PSSDataSet.Criteria, Category("Cat_id"))
For Each Contestant As DataRow In Me.PSSDataSet.Contestant.Rows
For Each Criteria As DataRow In Me.PSSDataSet.Criteria.Rows
TransactionsTableAdapter.Insert(JudgeContestid, Contestant("Con_id"), Criteria("Cri_id"), 0)
Next
Next
Next
End Sub
Now my problem is, how can I populate the datagrid using the data recently made by MakeTransaction() function?
I had my code working just fine, but when I generated new updated versions of the CSV files it suddenly errors out on me and gives me a type mismatch catch.
Here is the code that I have right now.
Dim A As String = "ADusers.csv"
Dim B As String = "MlnExp.csv"
Dim filePath As String = "C:\CSV"
Try
Dim ConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & (filePath) & "\;Extended Properties='text;HDR=Yes'"
Dim sSql As String = "SELECT *" _
& "FROM ([" & (B) & "] B LEFT JOIN [" & (A) & "] A ON B.EmployeeNumber = A.employeeID)"
Dim conn As OleDb.OleDbConnection = New OleDb.OleDbConnection(ConnectionString)
Dim Command As OleDb.OleDbCommand = New OleDb.OleDbCommand(sSql, conn)
Command.CommandType = CommandType.Text
conn.Open()
Dim da As OleDb.OleDbDataAdapter = New OleDb.OleDbDataAdapter(sSql, conn)
Dim dt As DataTable = New DataTable
da.Fill(dt)
DataGrid1.DataSource = dt
DataGrid1.Update()
conn.Close()
lblStatus.Text = "CSV combined... Now saving to file."
Catch ex As Exception
MsgBox(ex.Message, MsgBoxStyle.Exclamation)
End Try
Before it would go through, combine the two CSV files, and then display them in my datagrid. But now my catch is throwing back
Type mismatch in expression
i would check B.EmployeeNumber = A.employeeID
in both of your file one is a text value (left align) and the other is a a interger(right align)