请解决此错误.Argument异常被捕获 [英] Please solve this error.Argument Exception was caught

问题描述

The type of one of the primary key values did not match the type defined in the entity. See inner exception for details.
Parameter name: keyValues

{参数类型'Edm.Int32'和'Edm.String'与此操作不兼容。靠近WHERE谓词，行1，第82栏。}

{"The argument types 'Edm.Int32' and 'Edm.String' are incompatible for this operation. Near WHERE predicate, line 1, column 82."}

var loc = (e.Row.Cells[1].Text);
locationID = context.PanchayatiRajLocations.Find(loc).ID;

这里locationId是Int32的类型。

Here locationId is Type of Int32.

推荐答案

你好Neha，



您正在尝试将int与字符串进行比较导致此问题的查询我相信。

尝试先看看你在loc变量中获得的内容



否则尝试替换

Hi Neha,

You are trying to compare int with string the query that leads to this problem I believe.
Try to see what you get in loc variable first

otherwise try to replace

var loc = (e.Row.Cells[1].Text);

使用此行

with this line

var loc = Convert.ToInt32(e.Row.Cells[1].Text);

更新解决方案：

试试这个查询，看看你得到了什么...

Updated solution:
Try this query and see what you get...

var locationID = from obj in context.PanchayatiRajLocations
                           where loc == "London"
                           select obj.ID;

希望这对你有所帮助。



问候，

RK

Hope this helps you a bit.

Regards,
RK

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