Home  >  Article  >  How to solve the problem that the object is not referenced to the instance

How to solve the problem that the object is not referenced to the instance

hzc
hzcOriginal
2020-06-17 17:04:2641466browse

How to solve the problem that the object is not referenced to the instance

The steps to solve the error "The object reference is not set to an instance of the object" are as follows:

1. First, the set variable is empty or has no value. When getting the value, this problem usually occurs when passing parameters. It also occurs when using data controls such as DataGrid, gridview, or datalist.

How to solve the problem that the object is not referenced to the instance

#2. The setting control name does not correspond to the one in codebehind.

How to solve the problem that the object is not referenced to the instance

#3. The object is not initialized with new or the control referenced in the program does not exist.

How to solve the problem that the object is not referenced to the instance

4. Then use try..catch...finally to catch the error, or directly use response.write() to output the variable value.

How to solve the problem that the object is not referenced to the instance

#5. Check whether there are uninitialized variables in the code to solve the problem of "the object reference is not set to the instance of the object".

How to solve the problem that the object is not referenced to the instance

The above is the detailed content of How to solve the problem that the object is not referenced to the instance. For more information, please follow other related articles on the PHP Chinese website!

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn