- This tutorial shows you how to use SQL Server Language Extensions to create a C# class that receives two columns (ID and text) from SQL Server and a regular expression (regex) as an input parameter.learn.microsoft.com/en-us/sql/language-extensions/tutorials/search-for-string-us…
C# database search (how to create query string) - Stack Overflow
2015年3月24日 · I am trying to make a MySQL database search in my C# WindowsForms app. I have 16 search values (for example: age, status, height, weight, ... etc.). The thing is, that I do not need to fill all values to perform the search and I do not know how to set up the query string.
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代码示例
string query = "SELECT * FROM table WHERE 1 = 1";if( age.HasValue ) query += " AND age = " + age.Value;if( name.HasValue) query += " AND name LIKE \"%" + name.Value + "\"";if( id.HasValue) query += " AND id = " + id.value;MySqlCommand cmdSearch = new MySqlCommand(querySearch, conn);...How to search strings - C# | Microsoft Learn
- You can use two main strategies to search for text in strings. Methods of the String class searc…
The string type, which is an alias for the System.String class, provides a number of useful methods for searching the contents of a string. Among them are Contains, StartsWith, EndsWith, IndexOf, LastIndexOf. The System.Text.RegularExpressions.Regex class provides a rich vocab…
- You can use two main strategies to search for text in strings. Methods of the String class searc…
C# Tutorial - Search data in database | FoxLearn - YouTube
C# Database Search String 的相关搜索
Search string from Datatable in C# - Saurabh Gupta's Blog
2019年5月16日 · If you want to search for this string in any column instead: DataRow[] filteredRows = tb.Select(“FIRSTNAME LIKE ‘%” + searchstring + “%’ OR LASTNAME LIKE …
Use LINQ to query strings - C# | Microsoft Learn
2024年4月25日 · In this article, there are several example queries that query strings for different characters or words, filter strings, or mix queries with regular expressions. How to query for …
Tutorial: Regex string search in C# - SQL Server …
2024年4月29日 · This tutorial shows you how to use SQL Server Language Extensions and run C# code that search a string with regular expressions (regex).
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