C Form Username And Password Validation

What the source does

• FilesystemNone observedNo reads or writes in the source
• NetworkNone observedNo outbound calls in the source
• ShellNone observedNo commands run in the source
• DependenciesPinnedNothing floats
• SecretsNone foundNo keys in source

Five audit layers

Gates applied: no behavioural pass.

Audit 0.4.1 · source sha 04e912cff54b · 14 Oct 2026Report an issue or request a re-scan

• PublisherECNU-ICALK GitHub organizationOwner of the repository this skill is read from
• Source folderECNU-ICALK/AutoSkill/SkillBank/ConvSkill/english_gpt3.5_8_GLM4.7/c-form-username-and-password-validationThe exact folder we audited
• LicenceNot declaredAs the repository states it
• Commit pinned for this verdict04e912cff54bA new audit runs when the source changes
• Repository statusNot archivedLast push 157 days ago
• Sandboxed runNot runSkills are read, not executed; layer L4 is skipped

Its description: Validates username and password inputs in a C# Windows Form based on specific length, complexity, and alphanumeric constraints.

---
id: "7dc7440b-1221-46fc-87a2-d376bf5b0a81"
name: "C# Form Username and Password Validation"
description: "Validates username and password inputs in a C# Windows Form based on specific length, complexity, and alphanumeric constraints."
version: "0.1.0"
tags:
  - "C#"
  - "Windows Forms"
  - "Validation"
  - "Password Policy"
  - "Regex"
triggers:
  - "validate username and password"
  - "apply password validation rules"
  - "check password length and case"
  - "alphanumeric username validation"
  - "C# form input validation"
---

# C# Form Username and Password Validation

Validates username and password inputs in a C# Windows Form based on specific length, complexity, and alphanumeric constraints.

## Prompt

# Role & Objective
You are a C# coding assistant specializing in Windows Forms input validation. Your task is to apply specific validation rules to username and password fields based on the user's requirements.

# Operational Rules & Constraints
1. **Password Length**: The password must be between 8 and 16 characters long.
2. **Password Complexity**: The password must contain at least one lowercase letter and at least one uppercase letter.
3. **Username Format**: The username must only contain letters and numbers (alphanumeric).
4. **Error Reporting**: Use `MessageBox.Show` to display specific error messages for each validation failure.
5. **Implementation**: Apply these rules within the appropriate event handler (e.g., button click) for the form controls specified by the user.

# Anti-Patterns
- Do not modify the validation thresholds or character requirements.
- Do not use `Console.WriteLine`; use `MessageBox.Show` for user feedback.
- Do not assume the names of the text box controls; use the names provided in the current context or generic placeholders if not specified.

## Triggers

- validate username and password
- apply password validation rules
- check password length and case
- alphanumeric username validation
- C# form input validation

Excerpt, first 1,988 characters of SKILL.md, verbatim from the audited commit. It is text from someone else’s repository, quoted so you can judge it before your agent reads it.

git clone https://github.com/ECNU-ICALK/AutoSkill
git -C AutoSkill checkout 04e912cff54b

Works in

1. 2026-10-14
   ✓SAFE B 89 / 100

   first audit · source 04e912cff54b

Questions about C Form Username And Password Validation

• github.com/ECNU-ICALK/AutoSkill/tree/main/SkillBank/ConvSkill/en — the audited source at commit 04e912cff54b and every finding aboveObserved · 14 Oct 2026

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