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sql server vb .net how to search for records

Posted on 2009-05-05
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Last Modified: 2012-05-06
hello,
I have a database application, I used sqlconnection, sqldataadapter and dataset. I have all the functions (update,delete,insert) but I want to have a textbox to search for records based on the textbox string eg. if the textbox has  an "s" to display the records of the cities which start with "s" (cities is a record field)
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Question by:kyriakos70
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Expert Comment

by:jpaulino
ID: 24303239
You can use a SqlDataReader and use a correct T-SQL command.
http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqldatareader.aspx 
Somehting like:
 "SELECT * FROM myTable WHERE [Field1] LIKE '" & Me.TextBox1.TexT & "%'"
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Expert Comment

by:Tapan Pattanaik
ID: 24303290

SQL Syntax:

"SELECT * FROM TableName WHERE city LIKE ' %S'
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Expert Comment

by:jpaulino
ID: 24303315
@tapanpattanaik,
That is for something that ends with "S", not starts!
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Expert Comment

by:Tapan Pattanaik
ID: 24303386
sorry to kyriakos70 and jpaulino,
     
                             I have mention the "%" mark in wrong location

correct location:

SQL Syntax:

"SELECT * FROM TableName WHERE city LIKE ' S %'
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Author Comment

by:kyriakos70
ID: 24305794
Yes but I have created a dataadapter with this parameter ' SELECT     id, aa, DIAKRITIKO, date_fortosis, num_autokinitou, topos_fortosis, topos_proorismou, apostoleas, receiver, entoleas, parastatiko_apostolea, product,
                      litres, kilos, net_value, base_flag, center_pump, various_expenses, FPA, tolls, General_sum, comments, payer, payer_id
FROM         Taxinomisi_fortotikon
WHERE     (aa LIKE @aaa + '%') '
How can I add the text box to this statment?

Kyriakos
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Author Comment

by:kyriakos70
ID: 24305994
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Form2.SqlDataAdapter2.Fill(Form2.DataSet21)
End Sub

' SELECT     id, aa, DIAKRITIKO, date_fortosis, num_autokinitou, topos_fortosis, topos_proorismou, apostoleas, receiver, entoleas, parastatiko_apostolea, product,
                      litres, kilos, net_value, base_flag, center_pump, various_expenses, FPA, tolls, General_sum, comments, payer, payer_id
FROM         Taxinomisi_fortotikon
WHERE     (aa LIKE 'form2.textbox1.text') <changed to this but I get nothing I want the parameter to have the value of the textbox1 and display the results by pressing a button (button1_click procedure'
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Author Comment

by:kyriakos70
ID: 24306153
I have inserted this :
Try
TextBox1.Text = Form2.SqlDataAdapter2.SelectCommand.Parameters.Item(0).Value
Form2.SqlDataAdapter2.Fill(Form2.DataSet21)
...
and get this error
parametrized query (@aaa int) needs value ... expects parameter which was not supplied

and the sql string : ..... FROM  Taxinomisi_fortotikon
WHERE  (aa LIKE @aaa) <changed to this
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LVL 48

Expert Comment

by:jpaulino
ID: 24306560
If you will use parameters you define the parameter later, if you do that in the string you can do:
WHERE    (aa LIKE '" &  me.textbox1.text & "%')
 
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Author Comment

by:kyriakos70
ID: 24306707
Hello,
Found it Thank you all.

Kyriakos
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Author Comment

by:kyriakos70
ID: 24307814
Hello,
Not found all, it worked after I have changed to :
Try
Form2.SqlDataAdapter2.SelectCommand.Parameters.Item(0).Value = TextBox1.Text
Form2.SqlDataAdapter2.Fill(Form2.DataSet21)

But I want to have multiple parameters in the sql stament and choose in what parameter to give a value

SELECT     id, aa, DIAKRITIKO, date_fortosis, num_autokinitou, topos_fortosis, topos_proorismou, apostoleas, receiver, entoleas, parastatiko_apostolea, product,
                      litres, kilos, net_value, base_flag, center_pump, various_expenses, FPA, tolls, General_sum, comments, payer, payer_id
FROM         Taxinomisi_fortotikon
WHERE     (aa LIKE @aad) OR
                      (DIAKRITIKO LIKE @diak) OR
                      (date_fortosis LIKE @date) OR
                      (num_autokinitou LIKE @num + '%') OR
                      (topos_fortosis LIKE @toposf + '%') OR
                      (topos_proorismou LIKE @toposp + '%') OR
                      (apostoleas LIKE @apost + '%') OR
                      (receiver LIKE @reiceiv + '%') OR
                      (entoleas LIKE @entolea + '%') OR
                      (parastatiko_apostolea LIKE @parast_ap + '%') OR
                      (product LIKE @produc + '%') OR
                      (litres LIKE @litr) OR
                      (kilos LIKE @kil) OR
                      (net_value LIKE @netv) OR
                      (base_flag LIKE @basef) OR
                      (center_pump LIKE @centerp) OR
                      (various_expenses LIKE @varexp) OR
                      (FPA LIKE @fpa) OR
                      (tolls LIKE @toll) OR
                      (General_sum LIKE @gens) OR
                      (comments LIKE @comm + '%') OR
                      (payer LIKE @paye + '%')
when I give a value to parameter num(2)(@date) it keeps telling me that needs a value for parameter num(0) (@aad)
how can I have multiple parameters and give only to one value to return me the record(s) :
eg. Form2.SqlDataAdapter2.SelectCommand.Parameters.Item(2).Value = TextBox1.Text
Form2.SqlDataAdapter2.Fill(Form2.DataSet21)

Kyriakos

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LVL 48

Accepted Solution

by:
jpaulino earned 500 total points
ID: 24308731
You use:
Form2.SqlDataAdapter2.SelectCommand.Parameters.Add("@parametername", parameterType).Value = TextBox1.Text

 
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Expert Comment

by:jpaulino
ID: 24312581
Any update ?
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Author Comment

by:kyriakos70
ID: 24312711
And how do I add the '%' operator?
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Author Comment

by:kyriakos70
ID: 24312778
Works.

Thank you
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LVL 48

Expert Comment

by:jpaulino
ID: 24312866
You add the operator in the SQL command and you pass only the parameter.
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Author Comment

by:kyriakos70
ID: 24316860
No,
it is not working now tells me it needs a value even with one parameter.

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LVL 48

Expert Comment

by:jpaulino
ID: 24316881
You have to show the code ?
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Author Comment

by:kyriakos70
ID: 24327665
here is the code of the commandtext of the select command but it is always returns the original commandtext, how can I change it at runtime or how can I use the sqldatareader and show the results to a dbgrid?
code below doesn' work
Select Case ComboBox1.Items.Count
            Case 0              Form2.SqlDataAdapter2.SelectCommand.CommandText = "SELECT * FROM Taxinomisi_fortotikon WHERE aa LIKE @aad"
                Form2.SqlDataAdapter2.SelectCommand.Parameters.Item(0).Value = TextBox1.Text
            Case 1
                Form2.SqlDataAdapter2.SelectCommand.CommandText = "SELECT * FROM Taxinomisi_fortotikon WHERE DIAKRITIKO LIKE @diak"
                Form2.SqlDataAdapter2.SelectCommand.Parameters.Item(0).Value = TextBox1.Text

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