LInq使用等于两个列表 [英] LInq Using Equals for two lists

问题描述

List<string> source = new List<string>(new string[] { "abc", "def" });
List<string> target = new List<string>(new string[] { "abc", "def" });
var containsAll = source.Equals(target);

为什么它永远不会是真的..？



任何建议都表示赞赏。

why it is never true..?

any suggestion is appreciated.

推荐答案

因为实例不等于.Equals方法只有当实例相等时才返回true否则返回false

使用以下代码：

Because There Instance Are Not Equal.Equals Method Only return true when there instance are equal otherwise return false
Use The following Code:

List<string> source = new List<string>(new string[] { "abc", "def" });
        List<string> target = new List<string>(new string[] { "abc", "def" });
        var containsAll = source.SequenceEqual(target);

DataTable table1 = new DataTable（）;

table1。 Columns.Add（new DataColumn（Name，Type.GetType（System.String）））;

DataRow row1 = table1.NewRow（）;

row1 [Name] =rahul;

table1.Rows.Add（row1）;

DataTable table2 = new DataTable（）;

table2.Columns.Add（new DataColumn（Name，Type.GetType（System.String）））;

DataRow row2 = table2.NewRow（）;

row2 [Name] =Rahul;

table2.Rows.Add（row2）;

bool value = table1.Rows [0] [0] .ToString（）。Equals（table2.Rows [0] [0] .ToString（），StringComparison.InvariantCultureIgnoreCase）;

DataTable table1 = new DataTable();
table1.Columns.Add(new DataColumn("Name", Type.GetType("System.String")));
DataRow row1 = table1.NewRow();
row1["Name"] = "rahul";
table1.Rows.Add(row1);
DataTable table2 = new DataTable();
table2.Columns.Add(new DataColumn("Name", Type.GetType("System.String")));
DataRow row2 = table2.NewRow();
row2["Name"] = "Rahul";
table2.Rows.Add(row2);
bool value = table1.Rows[0][0].ToString().Equals(table2.Rows[0][0].ToString(), StringComparison.InvariantCultureIgnoreCase);

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