Janus GridEx：如何过滤整数和字符串

Question

我正在向Janus GridEx添加一个关键字搜索，并认为最简单的方法就是将每个列的OR一起过滤条件。大多数列都是字符串，它们工作正常。如果“From”是整数列，则最后一行在执行条件时失败，并显示错误“输入字符串格式不正确”。我可以添加过滤条件和一些String类型的列，有些列类型为Integer吗？

        var fromCondition = new GridEXFilterCondition();
        fromCondition.Column = dgDrawings.RootTable.Columns["From"];
        fromCondition.ConditionOperator = ConditionOperator.Contains;
        fromCondition.Value1 = keyword_searchTextBox.Text;

        var toCondition = new GridEXFilterCondition();
        toCondition.Column = dgDrawings.RootTable.Columns["To"];
        toCondition.ConditionOperator = ConditionOperator.Contains;
        toCondition.Value1 = keyword_searchTextBox.Text;

        compositeCondition.AddCondition(LogicalOperator.Or, fromCondition);
        compositeCondition.AddCondition(LogicalOperator.Or, toCondition);

        drawings.RootTable.FilterCondition = compositeCondition;

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