Count value in Cells of Gridview (asp.net)

Question

1.00/5 (1 vote)

See more:

Hi programmer,
I have code for web:

VB

Private Sub CountHoNgheo()
        Try
            Dim HoN As Integer = 0
            For i As Integer = 0 To dgInput.Rows.Count - 1
                If dgInput.Rows(i).Cells(6).Text Like "ABC" Then
                    HoN = HoN + 1
                End If
            Next
            lblNgheo1.Text = HoN.ToString
        Catch ex As Exception
            lblMessage.Text = ex.ToString
        End Try
End Sub

The result is 0. (In fact, result = 2)
Cell index number is correct.
Also, with this code in application, applied to DataGridView, the result is correct.

Best thank

Posted 10-Feb-15 20:46pm

thuydao

Updated 10-Feb-15 20:56pm

v3

Add a Solution

Comments

Maciej Los 11-Feb-15 3:22am

What's datasource?

thuydao 11-Feb-15 4:30am

I'm using access.

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

thuydao · Answer 1 · 2015-02-11T15:51:00

Ok, I've done it. This is my code:

VB

Private Sub CountHoNgheo()
        Try
            Connect()
            Dim ds As New DataSet
            ds.Clear()
            Dim da As New OleDbDataAdapter("SELECT * from tblKH WHERE(((tbl.A) = 'ABC'))", cn)
            lblNgheo1.Text = da.Fill(ds, "tbl").ToString
        Catch ex As Exception
            lblMessage.Text = ex.ToString
        End Try
End Sub

Thank for your suggestion!

Maciej Los · Answer 2 · 2015-02-11T05:05:00

Solution 1

Instead of using for - loop on the gridview, use SQL query as is shown below:

SQL

SELECT COUNT(*)
FROM TableName
WHERE FieldName Like "ABC*"

For further information, please see:
Walkthrough: Editing an Access Database with ADO.NET[^]
ADO.NET Code Examples[^]
Using ADO.NET for beginners[^]

Posted 11-Feb-15 5:05am

Maciej Los

Comments

thuydao 11-Feb-15 19:59pm

Dear,
I want to show the counting result in label or textbox (not in GridView).
Thanks

Maciej Los 12-Feb-15 1:44am

What's the difference? Control is control no matter of its name.

thuydao 12-Feb-15 2:51am

I solved my problem by using SQL query db directly.
But I want to query in GridView because my project is:
- Search item (with criteria) and show in GridView
- Then, Count item in cells of GridView.
If I using SQL query, it will show total of all items without filtering
Thanks,

Maciej Los 12-Feb-15 3:23am

I think you should use Linq to achieve that.

thuydao 12-Feb-15 3:27am

please introduce about Linq.
Thanks

Maciej Los 12-Feb-15 6:24am

Using LINQ with ASP.NET