我想传递一个Dictionary
来动态设置变量,而不是对类构造函数进行大量重载。
// Class definition
public class Project
{
public DateTime LastModified;
public string LoanName;
public string LoanNumber;
public int LoanProgram;
public string ProjectAddress;
...
// Project class constructor
public Project(Dictionary<string, object> Dict)
{
foreach (KeyValuePair<string, object> entry in Dict)
{
// ie, when the Key is "LoanName", this.LoanName is set
this.(entry.Key) = entry.Value; // <-- Does not compile, obviously
}
}
}
// application code
...
Dictionary<string, object> dict = new Dictionary<string,object>();
dict.Add("LoanName", "New Loan Name");
dict.Add("LoanProgram", 1);
dict.Add("ProjectAddress", "123 Whatever Way");
Project p = new Project(dict);
...
在构造函数中,有没有办法使用Dictionary Key(一个字符串)来确定要设置的类成员?可以用某种方式使用反射来完成吗?
答案 0 :(得分:11)
字段已经公开...为什么不使用对象初始化语法?
var p = new Project() {
LoanName = "New Loan Name",
LoanProgram = 1,
ProjectAddress = "123 Whatever Way"
};
答案 1 :(得分:3)
public class Project
{
public DateTime LastModified;
public string LoanName;
public string LoanNumber;
public int LoanProgram;
public string ProjectAddress;
...
// Project class constructor
public Project(Dictionary<string, object> Dict)
{
foreach (KeyValuePair<string, object> entry in Dict)
{
this.GetType().GetProperty(entry.Key).SetValue(this, entr.Value, null);
}
}
}
答案 2 :(得分:1)
这似乎是一场维护噩梦,但你可以这样查看房产。
var prop = typeof(Project).GetProperty(entry.Key);
然后你可以像这样设置值。
prop.SetValue(this, entry.Value);
虽然没有编译时间类型检查。
答案 3 :(得分:0)
我建议查看默认参数。
e.g。
public Project(loanName = null, lastModified = null, loanNumber = null, loanProgram = 0, projectAddress = null)
{
//Set them in here
}
我还建议使用公共属性而不是公共字段。 e.g。
public DateTime LastModified { get; private set; } //Makes it so only inside the class LastModified can be set