Скачать или смотреть How to Display Multiple Values in a Textbox Without a Trailing Comma in VB.net

Learn how to modify your VB.net code to display multiple names in a textbox without ending with a trailing comma. Follow our solution for clean output!
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This video is based on the question https://stackoverflow.com/q/77535718/ asked by the user 'DeveloperGuy' ( https://stackoverflow.com/u/16991901/ ) and on the answer https://stackoverflow.com/a/77537537/ provided by the user 'Shahram Alemzadeh' ( https://stackoverflow.com/u/12056172/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Display Multiple Values in a Textbox Without a Trailing Comma in VB.net

When working with VB.net, you may encounter a common issue while displaying multiple values in a textbox, especially when fetching data from a grid view. A frequent problem is that the values get concatenated with commas, leading to an unwanted trailing comma at the end. For example:

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In this guide, we'll explore how to fix this issue and achieve the desired output:

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Understanding the Problem

In your original code, the loop for concatenating values from the grid view is set in such a way that it adds a comma after each name, without checking if it is the last item:

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Why is this a Problem?

Trailing Comma: The trailing comma creates a visual clutter and can confuse readers or users.

Messy Output: Having an extra comma at the end makes the output look unprofessional and incomplete.

The Solution

To resolve this issue, you can utilize a list of strings to hold the names from the selected column and then use the Join function to concatenate them properly without a trailing comma. Here’s how to implement this solution step-by-step.

Step 1: Create a List to Store Names

Instead of directly manipulating the textbox in the loop, declare a new list to store the names:

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Step 2: Populate the List

Loop through the grid view and add each name to the list. Here’s the modified loop:

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Step 3: Join the Names into a Single String

Once all names are added to the list, use the Join function to concatenate them into a single string, separated by commas:

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Complete Code Implementation

Putting it all together, here’s the complete code snippet:

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Final Notes

This approach is cleaner and ensures that the output does not have any unwanted trailing commas. This not only improves the presentation of the data but also enhances the overall user experience when interacting with your application.

Now you can effectively display multiple names in a textbox, formatted correctly without trailing commas. We hope this solution helps you solve the issue efficiently!