Last active
April 22, 2025 16:21
-
-
Save jbouy/6374173 to your computer and use it in GitHub Desktop.
Generate C# POCOs from SQL statement in LINQPadFrom http://www.necronet.org/archive/2012/10/09/generate-c-pocos-from-sql-statement-in-linqpad.aspx
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
public static class LINQPadExtensions | |
{ | |
private static readonly Dictionary<Type, string> TypeAliases = new Dictionary<Type, string> { | |
{ typeof(int), "int" }, | |
{ typeof(short), "short" }, | |
{ typeof(byte), "byte" }, | |
{ typeof(byte[]), "byte[]" }, | |
{ typeof(long), "long" }, | |
{ typeof(double), "double" }, | |
{ typeof(decimal), "decimal" }, | |
{ typeof(float), "float" }, | |
{ typeof(bool), "bool" }, | |
{ typeof(string), "string" } | |
}; | |
private static readonly HashSet<Type> NullableTypes = new HashSet<Type> { | |
typeof(int), | |
typeof(short), | |
typeof(long), | |
typeof(double), | |
typeof(decimal), | |
typeof(float), | |
typeof(bool), | |
typeof(DateTime) | |
}; | |
public static string DumpClass(this IDbConnection connection, string sql) | |
{ | |
if(connection.State != ConnectionState.Open) | |
connection.Open(); | |
var cmd = connection.CreateCommand(); | |
cmd.CommandText = sql; | |
var reader = cmd.ExecuteReader(); | |
var builder = new StringBuilder(); | |
do | |
{ | |
if(reader.FieldCount <= 1) continue; | |
builder.AppendLine("public class Info"); | |
builder.AppendLine("{"); | |
var schema = reader.GetSchemaTable(); | |
foreach (DataRow row in schema.Rows) | |
{ | |
var type = (Type)row["DataType"]; | |
var name = TypeAliases.ContainsKey(type) ? TypeAliases[type] : type.Name; | |
var isNullable = (bool)row["AllowDBNull"] && NullableTypes.Contains(type); | |
var collumnName = (string)row["ColumnName"]; | |
builder.AppendLine(string.Format("\tpublic {0}{1} {2} {{ get; set; }}", name, isNullable ? "?" : string.Empty, collumnName)); | |
} | |
builder.AppendLine("}"); | |
builder.AppendLine(); | |
} while(reader.NextResult()); | |
return builder.ToString(); | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment