How to search database in database in C#?

Question

1.00/5 (2 votes)

See more:

I want to search if I have a Person database in my database. How can I do this?
I would like to add person to the personinformation table in the person database, if any.

What I have tried:

Database Name:Person
Database Table:PersonInformation

//I WANT TO SEARCH DBNAME CODE İN C#.How to write this search dbname code.

if( dbname !=null)
{
  dbname.Add();
}

else
{
MessageBox.Show("Db not found");
}

Posted 5-Sep-19 11:19am

Member 14169626

Updated 5-Sep-19 22:01pm

v3

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

MadMyche · Answer 1 · 2019-09-05T12:03:00

The easiest query for you to run for checking a SQL Server for a particular database is to query the MasterDB for a count of databases matching that name

SQL

SELECT Count(*) FROM [Master].Sys.Databases WHERE [Name] = 'Person'

If this returns a value of 1, you can then query that PersonDB for tables matching the one that you want

SQL

SELECT Count(*) FROM Person.Information_Schema.Tables WHERE [Table_Name] = 'PersonInformation'

Maciej Los · Answer 2 · 2019-09-05T22:02:00

For EF, check this:

C#

public static class DbContextExtensions
    {
        public static IEnumerable<string> GetTableNames(this DbContext @this)
        {
            var tableNames = new List<string>();

            using (var connection = @this.Database.GetDbConnection())
            {
                connection.Open();
                using (var command = connection.CreateCommand())
                {
                    command.CommandText = "SELECT Distinct TABLE_NAME FROM information_schema.TABLES";
                    using (var reader = command.ExecuteReader())
                    {
                        if (reader.HasRows)
                        {
                            while (reader.Read())
                            {
                                tableNames.Add(reader.GetString(0));
                            }
                        }
                        reader.Close();
                    }
                }
                connection.Close();
            }
            return tableNames;
        }
    }

Source: How to get all table names of db using EF[^]

How to search database in database in C#?

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0