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VBA, Modify Existing Text File. In this article I will explain how you can modify an existing text file. Jump To You can download the file and code related to this article here. Please note that although the code is written in an Excel file, it is applicable to all MS Office products. Example 1, Overwrite Existing File With New Data. When you open a text file and modify its content, although it may seem you are modifying its content but you are actually creating a new text file and overwriting the previous file. Lets say we have the following text file in the location D Temp with the name Test. XS.jpg' alt='Vba Print Pdf File Without Opening The File' title='Vba Print Pdf File Without Opening The File' />The code below will open the text file and change the first line to Changes to First Line of Text File Sub Example. Open D Temp. Test. For Output As 1. Print 1, Changes to First Line of Text FileClose 1. End Sub Basically what happened in the code above was that a new text file was created and the previous text file was overwritten with new data For more information about writing to text files please see VBA Excel Writing to Text Files. Example 2, Modify Values in Text File. Excel VBA Print 2 Macro Code Examples To Quickly Setup, Print Or Print Preview Your Work. By Jorge A. Gomez. There are many advice of how to reduce the file size of your Excel workbook. Weve tested them and found some surprising results. Check out the full study Sub Example2 Final string to print to file Dim strFinal As String Line read from original text file Dim strLine As String Close 1 open the text file for reading. Working with Tables in Excel 2013, 20 VBA This article has also been published on Microsoft Office Online Working with Excel tables in Visual Basic for. You are here Home Excel VBA VBA to Create PDF from Excel Worksheet Then Email It With Outlook. In this example the following data is in a text file located in the path D Temp with the name Test. The code below adds 1. Sub Example. 2Final string to print to file Dim str. Final As String Line read from original text file Dim str. Line As String Close 1open the text file for reading Open D Temp. Test. txt For Input As 1str. Final loop until the end of the text file is reached While EOF1 Falseread the current line from the text file Line Input 1, str. The Life Of Thomas More By William Roper. Vba Print Pdf File Without Opening' title='Vba Print Pdf File Without Opening' />Example of outputting once cell per row to a file and using SHELL to view with NotePad or IExplore if. Line concatenate the modified line to the rest of the string str. Final str. Final Modify. Column. 3str. Line Wend str. Final Leftstr. Final, Lenstr. Final 2close the file Close 1open the file for writing Open D Temp. Test. txt For Output As 1. Print 1, str. Finaloverwrite the file with the new string Close 1. End Subthis function adds 1. Function Modify. Column. By. Val str. Input As String As String Dim arr. String As String Dim str. Output As String split the columns arr. String Splitstr. Input, concatenate the first 2 column as they are str. Output arr. String0 arr. String1 add 1. Output str. Output Strings. TrimStrCDblLeftarr. String2, Lenarr. String2 1 1. Cr. Lf. Modify. Column. Output. End Function Basically the code above does 3 thing Opens the text file and reads all the lines. Creates a new string variable with the modified data. Overwrites the original file. Although it seems we are modifying the original file but we are actually overwriting the original file with a new file. The final result can be seen in the figure below The line below opens the text file for reading Open D Temp. Test. txt For Input As 1. The code below loops through the text file until the last line is reached While EOF1 Falseread the current line from the text file Line Input 1, str. Line concatenate the modified line to the rest of the string str. Final str. Final Modify. Column. 3str. Line Wend. The line below reads the current line of the text file and stores it in the variable str. Line Line Input 1, str. Line. The line below passes the string str. Line to the function Modify. Column. 3. Modify. Column. 3 adds 1. For example for the first line str. Line has the value 1 John 1. After passing it to the function Modify. Column. 3 the output value will be 1 John 2. The return value from the function Modify. Column. 3 is then concatenated with the string str. Final. For more information about concatenating strings please see VBA Excel String Processing and Manipulation str. Final str. Final Modify. Column. 3str. LineThe function Modify. Column. 3 receives as input a line of text from the original text file. It adds 1. 00 to the last column and returns the result as output Function Modify. Column. 3By. Val str. Input As String As String End Function The line below splits the input string based on the space delimiter. The result is an array with 3 strings. For example for the first line 1 John 1. Strings0 1arr. Strings1 Johnarr. Strings2 2. 34For more information about splitting strings please see Excel VBA String Processing and Manipulation, Splitting Strings arr. String Splitstr. Input, The next line concatenates the first 2 columns without making any changes. For more information about concatenating strings please see VBA Excel String Processing and Manipulation str. Output arr. String0 arr. String1 The next line adds 1. This is done in several steps Step 1 First the numeric part of the string is extracted. For example in the first line the last column is 1. The numeric part would be 1. For more information about the Left function please see Excel VBA String Processing and Manipulation, Strings. Left Leftarr. String2, Lenarr. String2 1Step 2 In the next step the numeric part is converted to a double value. Note we cant add the value 1. That is the reason for this conversion. For more information about converting data types please see VBA Converting Data Types, Converting String to Double CDblLeftarr. String2, Lenarr. String2 1Step 3 The next step adds 1. CDblLeftarr. String2, Lenarr. String2 1 1. Step 4 The new number is converted to a string again. For more information about converting numeric values to strings please see VBA Converting Data Types, Converting a Numeric Value to a String, Str StrCDblLeftarr. String2, Lenarr. String2 1 1. Step 5 The string variable is concatenated with the dollar sign. For more information about concatenating strings please see VBA Excel String Processing and Manipulation StrCDblLeftarr. String2, Lenarr. String2 1 1. Step 6 A line feed character is added to the end of the string StrCDblLeftarr. String2, Lenarr. String2 1 1. Cr. Lf. Step 7 Column. For more information about concatenating strings please see VBA Excel String Processing and Manipulation str. Output str. Output StrCDblLeftarr. String2, Lenarr. String2 1 1. Cr. Lf. The line below removes the carriage return and line feed characters added to the last line str. Final Leftstr. Final, Lenstr. Final 2Example 3, Adding Open and Save File Dialogs. In the previous example the location of the input text file was predefined. It was also assumed that the new file overwrites the original file. In this example open and save file dialogs will be used. The open file dialog will request the user to select the location of the original text file. The save file dialog will prompt the user for a location to save the modified file. For more information about file and folder dialogs please see File and Folder Dialogs VBA Sub Example. Dim str. Open. Path As String selected path for saving the text file Dim str. Save. Path As String open file dialog result Dim int. Open. Result As Integer Dim str. Final As String Dim str. Line As String Close 1remove all previous filters Call Application. File. Dialogmso. File. Dialog. Open. Filters. Clearapply the. Call Application. File. Dialogmso. File. Dialog. Open. Filters. AddText File,. Application. File. Dialogmso. File. Dialog. Open. Allow. Multi. Select Falsedisplay the dialog int. Open. Result Application. File. Dialogmso. File. Dialog. Open. Show. If int. Open. Result lt 0 Then get file path str. Open. Path Application. File. Dialogmso. File. Dialog. Open. Selected. Items1 Open str.