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comparing values

Posted on 2014-01-17
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Last Modified: 2014-01-17
hello I am having trouble figuring out a method to compare two values that seem to be the same, but the number of decimal places is affecting the logic and I am not sure how to format the values correctly.

One of the values is an entity record field = 100.00000000000000000000
The other value is from a detailsview cell = 100.00

When I run this code:

                    If String.Equals(myHistoryRecipeRecord.MeltPointHigh, DirectCast(dvRecipeItem.Rows(6).Cells(1).Controls(0), TextBox).Text) Then
                        strRefineRecipeRecord.Append("MeltPointHigh: " & myHistoryRecipeRecord.MeltPointHigh & ", ")
                    Else
                        strRefineRecipeRecord.Append("MeltPointHigh: Old= " & myHistoryRecipeRecord.MeltPointHigh &
                                                     ", New= " & DirectCast(dvRecipeItem.Rows(6).Cells(1).Controls(0), TextBox).Text & ", ")
                    End If

It always fall to the else because the number of decimal places.

I have search for examples on how to format decimals coming from an entity record field, but I have not found anything that I can understand.

If any one could please explain to me how this can be done, that would be great.

Thank you so much.
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Question by:metropia
2 Comments
 
LVL 13

Accepted Solution

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akb earned 500 total points
ID: 39789623
The problem is that you are comparing strings, not numbers.

I don't program in Visual Basic.net but I think you need to use Convert.toDecimal().

i.e.
If  Convert.toDecimal(myHistoryRecipeRecord.MeltPointHigh =  Convert.toDecimal(DirectCast(dvRecipeItem.Rows(6).Cells(1).Controls(0), TextBox).Text) Then
                        strRefineRecipeRecord.Append("MeltPointHigh: " & myHistoryRecipeRecord.MeltPointHigh & ", ")
                    Else
                        strRefineRecipeRecord.Append("MeltPointHigh: Old= " & myHistoryRecipeRecord.MeltPointHigh &
                                                     ", New= " & DirectCast(dvRecipeItem.Rows(6).Cells(1).Controls(0), TextBox).Text & ", ")
                    End If
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Author Comment

by:metropia
ID: 39789684
You got it!
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