Home/ Questions/Q 8257241
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-08T02:07:56+00:00

am having 2 dataset. named as ds, ds1. dataset value contain value like this

  • 0

am having 2 dataset. named as ds, ds1. dataset value contain value like this

dataset(values from excel sheet)
--------
no  phone       title
91  9942321400  MR
91  9865015695  MR
91  9677031515  MR
91  9994828285  MR
91  9688104229  MR


dataset1 contain value like this(values from mysql table)
-------------------------------
phone
9942321400
9865015695
9677031515

compare 2 datset. if dataset are not equal to datset1 phone , we have to write that dataset phone no in notepad.but am getting wrong result.

mycode

Dim i As Integer = 0
        Do While (i <= ds1.Tables(0).Rows.Count - 1)
            Dim phone As String = ds1.Tables(0).Rows(i).Item(1).ToString
            Dim j As Integer = 0
            Do While (j <= Ds.Tables(0).Rows.Count - 1)
                Dim dumphone As String = Ds.Tables(0).Rows(j).Item(4).ToString
                If (dumphone <> phone) Then
                    TextBox1.AppendText(a.ToString & "|" & b.ToString & "|" & c.ToString)
                    sw.WriteLine(TextBox1.Text)
                    TextBox1.Text = ""
                End If
                j = (j + 1)
                'i = i + 1
            Loop
            i = (i + 1)
        Loop

my result in notepad

|91|9942321400|MR
|91|9942321400|MR
|91|9942321400|MR
|91|9942321400|MR
|91|9865015695|MR
|91|9865015695|MR
|91|9865015695|MR
|91|9865015695|MR
|91|9677031515|MR
|91|9677031515|MR
|91|9677031515|MR
|91|9677031515|MR    


but expected output in notepad like this
----------------------------------------
91|9994828285|MR
91|9688104229|MR
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Your code is comparing each line of the second dataset vs each line in the first.

    Your Do While blocks go through the entire thing, there is no exclusion code for it.

    So in your example, the first number it compares is dumphone(0) = 9942321400 It matches the first time it goes through the Do While when phone(0) = 9942321400. But then your Do While is still going. When it hits the second number, dumphone(1) = 9865015695, it doesn’t match, so you get your output line.

    Here’s one option of how you could get the desired output

    Dim toggle as Boolean = false
Do While (i <= ds1.Tables(0).Rows.Count - 1)
        Dim phone As String = ds1.Tables(0).Rows(i).Item(1).ToString
        Dim j As Integer = 0
        Do While (j <= Ds.Tables(0).Rows.Count - 1)
            Dim dumphone As String = Ds.Tables(0).Rows(j).Item(4).ToString
            If dumphone = phone Then toggle = true 'This will set your flag to add the output.
            j = (j + 1)
        Loop
            'After we're done checking if there's a match, we decided to add it to the output.
            If toggle = true Then
                TextBox1.AppendText(a.ToString & "|" & b.ToString & "|" & c.ToString)
                sw.WriteLine(TextBox1.Text)
                TextBox1.Text = ""
                toggle = false 'Reset the flag for the next value
            End If
            i = (i + 1) 'Move to the next value to check against.
    Loop
    • 0