SQL Server 预编译执行SQLs

问题描述：

MVC5项目，利用执行sql的方式获取数据，但是在利用预编译执行的时候报错了，字段XXXwhich was not supplied.

其实就是这个参数传了个null导致的。在传参数之前做个判断，如果为null就赋值为空串即可。

 (=

String sql = "select a.Id,a.UserName,a.TrueName,ISNULL(b.OTM, '0') as Flag from SysUser a left join FIX_MatchingModel b on cast(a.Id as varchar) = b.OTM and b.Id = @matchingId Where a.DepId = @DepId order by b.OTM desc";SqlParameter[] sqlParameters = { new SqlParameter { ParameterName = "matchingId", Value = matchingId }, new SqlParameter { ParameterName = "DepId", Value = depId } };DbContexts DbContext = new DbContexts();return DbContext.Database.SqlQuery<UserViewgt;(sql, sqlParameters).ToList();

Problem Description:

Mvc5 project, uses the method of executing SQL to obtain data, but reports an error when using precompiled execution, field xxxwhich was not supplied

In fact, this parameter passed a null. Make a judgment before passing the parameter. If it is null, it can be assigned as an empty string.

(=

String sql = "select a.Id,a.UserName,a.TrueName,ISNULL(b.OTM, '0') as Flag from SysUser a left join FIX_MatchingModel b on cast(a.Id as varchar) = b.OTM and b.Id = @matchingId Where a.DepId = @DepId order by b.OTM desc";SqlParameter[] sqlParameters = { new SqlParameter { ParameterName = "matchingId", Value = matchingId }, new SqlParameter { ParameterName = "DepId", Value = depId } };DbContexts DbContext = new DbContexts();return DbContext.Database.SqlQuery<UserViewgt;(sql, sqlParameters).ToList();

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