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POWhat's the best way to remove white space after a certain character in a string?
 

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  1. POWhat's the best way to remove white space after a certain character in a string?
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    <p>I'm trying to build a list that will be used as the in clause of a select statement. The requirement is to have the user enter a comma separated list of descriptions. Each description can contain spaces so I can't remove the spaces before splitting by comma to add the single quotes around each description. I want to remove all white space after a single quote since no description will start with a space. What's the best way to do this in VB.NET? Regular expression or a string function? Here's what I have so far.:</p> <pre><code>Partial Class Test Inherits System.Web.UI.Page Protected Sub cmdGetParts_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cmdGetParts.Click Dim sDescriptionList As String = "" BuildList(sDescriptionList) RemoveSpacesFromList(sDescriptionList) FillGrid(sDescriptionList) End Sub 'Build descriptions List based on txtDescriptionList.Text Private Sub BuildList(ByRef sDescriptionList As String) Dim sDescriptionArray As String() sDescriptionArray = txtDescriptionList.Text.Trim.Split(","c) Dim iStringCount As Integer = 0 For Each description In sDescriptionArray If iStringCount &gt; 0 Then sDescriptionList = sDescriptionList &amp; "," End If sDescriptionList = sDescriptionList &amp; "'" &amp; description &amp; "'" iStringCount = iStringCount + 1 Next End Sub **'This procedure removes unwanted spaces from description list Private Sub RemoveSpacesFromList(ByRef sList As String) sList = sList.Replace("' ", "'") End Sub** 'This procedure fills the grid with data for descriptions passed in Private Sub FillGrid(ByVal sDescriptionList As String) Dim bo As New boPart Dim dtParts As Data.DataTable dtParts = bo.GetPartByDescriptionList(sDescriptionList) GridView1.DataSource = dtParts GridView1.DataBind() End Sub End Class </code></pre> <p><strong><em>Edited: After reviewing this code I think I may be able to just place description.Trim inside the For Each loop of the BuildList procedure.</em></strong></p>
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    1. USJon
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    1. COUsing str = str & item in a loop scales very badly, as each added item doubles the memory usage. For each 10 more items the memory usage is around 1000 times larger. A StringBuilder is preferred for building a string i a loop, but with my suggestion below you don't need a loop at all.
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      1. USGuffa
 

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