59 lines
1.4 KiB
C#
59 lines
1.4 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Linq.Expressions;
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using System.Text;
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namespace SqlSugar
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{
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public class SubMax:ISubOperation
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{
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public bool HasWhere
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{
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get; set;
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}
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public string Name
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{
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get
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{
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return "Max";
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}
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}
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public Expression Expression
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{
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get; set;
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}
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public int Sort
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{
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get
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{
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return 200;
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}
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}
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public ExpressionContext Context
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{
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get; set;
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}
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public string GetValue(Expression expression = null)
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{
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var exp = expression as MethodCallExpression;
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var argExp = exp.Arguments[0];
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var parametres = (argExp as LambdaExpression).Parameters;
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if ((argExp as LambdaExpression).Body is UnaryExpression)
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{
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argExp = ((argExp as LambdaExpression).Body as UnaryExpression).Operand;
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}
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var result = "MAX(" + SubTools.GetMethodValue(Context, argExp, ResolveExpressType.WhereMultiple) + ")";
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var selfParameterName = Context.GetTranslationColumnName(parametres.First().Name) + UtilConstants.Dot;
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result = result.Replace(selfParameterName, SubTools.GetSubReplace(this.Context));
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return result;
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}
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}
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}
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