Windows batch command compare strings

Posted on 10.03.2021 Comments

Replace string % with %% using batch file

TOP Add leading spaces to a string to make sure the output lines up. Script Output. The example shows how to return the first 4 characters of a string. The key-value pairs are listed in the map variable separated by semicolon.

Key and value itself are separated by one dash character. Same can be used to tranlate a day-of-the-week short string into a day-of-the-week long string by changing the map content only. The example here shows how to extract the parts of a date. The string substitution feature can also be used to remove a substring from another string. The example shown here ape auto price 2019 all occurrences of "the " from the string variable str.

To replace a substring with another string use the string substitution feature. The example shown here replaces all occurrences "teh" misspellings with "the" in the string variable str. The example shows how to return the last 4 characters of a string. Use the FOR command to split a string into parts. The example shows how to split a date variable into its parts. Use the FOR command to trim spaces at the beginning of a variable.

In this example the variable to be trimmed is str. The FOR command can be used to safely remove quotes surrounding a string. If the string does not have quotes then it will remain unchanged. Trimming spaces at the end of a variable seems a little tricky. The following example shows how to use a FOR loop to trim up to 31 spaces from the end of a string.

It assumes that Delayed Expansion is enabled. The following example shows how to use the string substitution feature to trim up to 31 spaces from the end of a string. It assumes that the string to be trimmed never contains two hash " " characters in a row.Solved Compare two strings in Batch. Application Server. See More: Compare two strings in Batch. First of all, something that's bugging me. Sentences begin with a capital letter, and end with a single period.

Strangely, CMD never thinks about saying something. Get rid of the line before the else line. Well, it would be easier to know what's wrong if you put the exact code so that it can be tested Normally, when comparing two string in variable you I enclose them in " That's all I can think at this moment, however if you include the actual code may be I could look it and test it to help you find the problem.

windows batch command compare strings

Good call Razor2. I can't believe I didn't see it. Sorry Razor, i typed it wrong. I expect it should go in if condition My guess? Your IF statement is silently failing, so you're not really in the IF block. Tried it. It happens to me sometimes. In this cases you can use the set into to avoid spaces at the end Eg. Well, not exactly. What I'm talking about is to use the parenthesis to enclose the SET statement so that you can delimit the value to assign to the variable.

5 IF Statements to Use for Smarter Windows Batch Scripts

Of course, this will not work if the output of the command have the spaces. Start a discussion. Ask Your Question. Tip : Use Question Form such as " Why?Select all Open in new window. View solution. View Solution. Why EE? Courses Ask. Get Access. Log In. Web Dev. We help IT Professionals succeed at work. Last Modified: It seems that the wildcard character is not as easy to use in batch. Start Free Trial. View Solution Only. Steve Knight IT Consultancy. Commented: You can't do wildcards BUT you can check substrings, e.

What you have to do is assign to a variable and take part of that If you want to let us know what script you are trying to do here there might be other ways too if you want us to look. Author Commented: That is what I mean about delayedexpansion, i.

Unlock this solution and get a sample of our free trial. Just removed a line and changed a number, then it was perfect. No problem Get your personalized solution. Ask The Experts. Unlock the solution to this question. Thanks for using Experts Exchange. Please provide your email to receive a sample view! Sign in with Google. Sign in with LinkedIn. Continue with Facebook. Show Password. I understand and agree to the Terms of Use.

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While ajv-jsy's answer works most of the time, I had the same problem as MarioVilas. If one of the strings to be compared contains a double quote "the variable expansion throws an error. I have not been able to break it so far using this technique.

windows batch command compare strings

It works with empty strings and all the symbols I threw at it. Learn more. Asked 7 years, 4 months ago. Active 3 years, 5 months ago.

Viewed k times. How do we compare strings which got space and special chars in batch file? Link: stackoverflow.

If/Else, Nested If/Else Statements in Batch File Programming

Aug 7 '19 at Active Oldest Votes. Works for me Now works fine! This seems to fail if the variable already contains quotes. Solution: Enable delayed expansion and use! Kiquenet Bernardo Ravazzoni Bernardo Ravazzoni 77 4 4 bronze badges. This is wrong. You can use spaces, as long as you quote them. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.

The Overflow Blog. Tales from documentation: Write for your clueless users. Podcast a conversation on diversity and representation.Programming Windows. If you do a lot of work in Windows batch files, the IF statement offers a very powerful way to add flexibility to your scripts.

Unfamiliar with setting up scheduled jobs? Let us show you how to automate and schedule tasks. We have a few great examples, too. Read More. Then you can compare this to your expected Windows version. Some uses of this script would be for IT audits when you need to quickly run a script and make sure the current operating system is the latest, or whether it needs an upgrade.

The ability to compare strings in batch opens up a whole list of possibilities. You can use scheduled batch jobs to alert on these. Another useful situation where an IF statement in a batch file is to check for the existence of a data file.

A lot of times the batch job is just a monitoring tool that might be scheduled to check for new incoming data files in a specific directory. Then, the batch job may either copy that file over to another location where it can be processed, or kick off some windows script that processes the file into an Excel output. Read More ; some good background reading. Using a batch file to check whether a file exists in a directory is quick and easy. An aspect of batch file scripting that too few IT folks or programmers use is checking for errors.

There are a lot of batch jobs floating around out there that are performing critical IT tasks like backing up important files or running file copy operations. When these batch jobs fail, systems fail and people notice.

This way you can fix the issue proactively. If the application or command returned a zero, all is fine. If not, then you need to send yourself an email. You could always write an error log that you might check every morning, or launch a second application or command that attempts to do the copy using an alternate command.

The user just needs to follow your script name with the parameters defining their personal file path. Many people start using batch jobs for simple tasks that need to be executed in sequence. Of course if you really want to step it up a notch, you might consider taking a look at VBA with our guide on creating your first VBA applicationor maybe even learn Python programming. You can often use more advanced programming languages like these, or learn to use PowerShell 5 Reasons You Should Use PowerShell Instead of Batch Scripting PowerShell is what you'd get if you crossed the Command Prompt with Batch Scripting, threw in some extra features, and kicked it all up several notches.

Here are several reasons you should try it. Read Moreto accomplish many of the same tasks you currently use batch jobs for. Affiliate Disclosure: By buying the products we recommend, you help keep the site alive. Read more. Your email address will not be published.You can use multiple values for variable in complex batch files to distinguish different replaceable variables. The set parameter can represent a single group of files or several groups of files.

The following are valid file sets:. This continues until all of the files or groups of files that correspond to the set value are processed. In and do aren't parameters, but you must use them with this command. If you omit either of these keywords, an error message appears.

If command extensions are enabled that is the defaultthe following additional forms of for are supported:. The syntax is:. Recursive: Walks the directory tree that is rooted at drive : path and executes the for statement in each directory of the tree.

If set is just a single period. Iterating a range of values: Use an iterative variable to set the starting value start and then step through a set range of values until the value exceeds the set ending value end. If start is less than end the command will execute.

When the iterative variable exceeds endthe command shell exits the loop. You can also use a negative step to step through a range in decreasing values. For example, 1,1,5 generates the sequence 1 2 3 4 5 and 5,-1,1 generates the sequence 5 4 3 2 1. Iterating and file parsing: Use file parsing to process command output, strings, and file content.

Use iterative variables to define the content or strings that you want to examine, and use the various parsingkeywords options to further modify the parsing. Use the parsingkeywords token option to specify which tokens should be passed as iterative variables. File parsing consists of reading the output, string, or file content, and then breaking it into individual lines of text and parsing each line into zero or more tokens.

The for loop is then called with the iterative variable value set to the token. Blank lines are skipped. The set argument specifies one or more file names. Each file is opened, read, and processed before moving to the next file in set. To override the default parsing behavior, specify parsingkeywords. This is a quoted string that contains one or more keywords to specify different parsing options.

Variable substitution: The following table lists optional syntax for any variable I :. It is treated as a command line, which is passed to a child Cmd. The output is captured into memory and parsed as if it is a file. To display the contents of all the files in the current directory that have the extension. In the preceding example, each file that has the. Otherwise, the variable is ignored and an error message is displayed. This command parses each line in myfile.

It ignores lines that begin with a semicolon and passes the second and third token from each line to the for body tokens are delimited by commas or spaces. If the file names that you supply contain spaces, use quotation marks around the text for example, File Name.

To use quotation marks, you must use usebackq. Otherwise, the quotation marks are interpreted as defining a literal string to parse. Submit and view feedback for.

Skip to main content. Contents Exit focus mode.If the condition specified in an if clause is true, the command that follows the condition is carried out. If the condition is false, the command in the if clause is ignored and the command executes any command that is specified in the else clause.

When a program stops, it returns an exit code. To use exit codes as conditions, use the errorlevel parameter. You must use the else clause on the same line as the command after the if. To display the message Cannot find data file if the file Product. To format a disk in drive A and display an error message if an error occurs during the formatting process, type the following lines in a batch file:.

To delete the file Product. Submit and view feedback for. Skip to main content. Contents Exit focus mode. You do not need to enclose literal strings in quotation marks.

These comparisons are generic, in that if both string1 and string2 are comprised of numeric digits only, the strings are converted to numbers and a numeric comparison is performed.

The first version is 1. It increases by increments of one when significant enhancements are added to the command extensions. The cmdextversion conditional is never true when command extensions are disabled by default, command extensions are enabled.

Displays help at the command prompt. Remarks If the condition specified in an if clause is true, the command that follows the condition is carried out. Examples To display the message Cannot find data file if the file Product. Is this page helpful? Yes No. Any additional feedback? Skip Submit. Submit and view feedback for This product This page. View all page feedback. Specifies a true condition only if the previous program run by Cmd.

Specifies a true condition only if string1 and string2 are the same. Forces string comparisons to ignore case. Specifies a true condition only if the internal version number associated with the command extensions feature of Cmd.

windows batch command compare strings

Specifies a command-line command and any parameters to be passed to the command in an else clause.