验证用户的输入

Question

我有3个文本框：textbox1，textbox2，textbox3。用户只允许在一个文本框中填写信息。

before_deploy:
- export ELASTIC_BEANSTALK_LABEL=$(git tag --contains)
- git clone -b master https://github.com/jasny/dpl.git /tmp/dpl
- (cd /tmp/dpl && gem build dpl.gemspec && cp *.gem "$TRAVIS_BUILD_DIR")
deploy:
  provider: elasticbeanstalk
  edge: local
  access_key_id: ...
  secret_access_key:
    secure: ...
  region: eu-west-1
  app: dms
  env: dms-travis-test
  bucket_name: elasticbeanstalk-eu-west-1-930677074220
  bucket_path: dms
  on:
    branch: travis-deploy

还有另一种验证这些文本框的方法吗？我希望更短版本。

Answer 1

怎么样：

var state1 = string.IsNullOrWhiteSpace(textbox1.Text);
var state2 = string.IsNullOrWhiteSpace(textbox2.Text);
var state3 = string.IsNullOrWhiteSpace(textbox3.Text);

if (!(state1 || state2 || state3))
{
    return "Please Enter a Search Parameter";
}
if (!(state1 ^ state2 ^ state3))
{
    return "Please only enter one Criteria";
}
if (state1)
{
    return "Something else";
}
if (state2)
{
    return "Something there";
}
return "Something here";