如何使用 Dapper 动态获取列的值

Question

使用 Dapper，如何动态获取表中列的值？

我有什么：

string tableName = "Table1";
int itemId = 1;
string columName = "MyBitColumn";
var query = string.Format("select {0} from {1} where {1}Id = @itemId", columnName, tableName);
var entity = conn.Query(query, new { itemId }).FirstOrDefault();
// I'd like something like this...
bool val = entity[columnName] as bool; // returns true or false, given that "MyBitColumn" is a bit in my sql db

谢谢！

Answer 1

您可以将实体强制转换为IDictionary<string, object>并按名称访问：

var entity = (IDictionary<string, object>) ... // your code
if((bool)entity[column name]) { ... }