Question

我需要使用简单查询构建器生成sql查询我已将所需的dll添加到我的项目中这是我的代码..

<keqwc:EntitiesPanel ID="EntitiesPanel1" runat="server" BorderStyle="None" ToolTip="Entities and attributes"
    UseAppearanceStyle="False" ToolBarOnTop="False" UseDefaultStyle="False" Height="600px" Width="100%">
</keqwc:EntitiesPanel>

<keqwc:QueryColumnsPanel ID="QueryColumnsPanel1" runat="server" BorderStyle="none"
                                ToolTip="Result Columns" UseDefaultStyle="False"
                                UseAppearanceStyle="False"
                                Appearance-RowButtonTooltip="Click here to see all available operations" height="170px" Width="100%">
 </keqwc:QueryColumnsPanel>
 <keqwc:SortColumnsPanel ID="SortColumnsPanel1" runat="server" ToolTip="Columns Sorting" BorderStyle="none" UseDefaultStyle="False"
                                UseAppearanceStyle="False" Width="100%" height="170px">
                            </keqwc:SortColumnsPanel>
 <keqwc:QueryPanel ID="QueryPanel1" runat="server"
                            BorderStyle="none" ScrollBars="Auto"
                            Appearance-ScriptMenuStyle-ItemMinWidth="160"
                            UseListCache="True"
                            UseDefaultStyle="False" UseAppearanceStyle="False" Height="200px" Width="100%">
  </keqwc:QueryPanel>

<asp:TextBox ID="SqlTextBox" runat="server" TextMode="MultiLine" Height="215px" width="100%"></asp:TextBox>

并且在后面的代码中我添加了使用..

加载实体模型

private DbQuery query = null;
protected void Page_Load(Object sender, EventArgs e)
{
    query = (DbQuery)Session["QUERY"];
    if (query == null)
    {
        string modelPath = "C:\\Users\\Public\\Documents\\KorzhEasyQuery\\samples\\WebDemoAjaxCS\\App_Data\\NWindMDB.xml";

        Korzh.EasyQuery.DataModel model = new Korzh.EasyQuery.Db.DbModel();
        model.LoadFromFile(modelPath);

        query = new Korzh.EasyQuery.Db.DbQuery();
        query.Model = model;

        query.Formats.SetDefaultFormats(FormatType.MsSqlServer);
        Session["QUERY"] = query;
        QueryPanel1.Query = query;
        QueryColumnsPanel1.Query = QueryPanel1.Query;

        EntitiesPanel1.Query = QueryPanel1.Query;
        SortColumnsPanel1.Query = QueryPanel1.Query;


    }

}

我需要根据指定的条件生成sql查询，排序顺序和列如何继续这个...？

单击添加列并选择所选列未在给定查询面板中显示的列。

Answer 1

将最后4行移到“if”语句之外：

    if (query == null)
    {
     .  .  .  .  .     
    }
    QueryPanel1.Query = query;
    QueryColumnsPanel1.Query = QueryPanel1.Query;

    EntitiesPanel1.Query = QueryPanel1.Query;
    SortColumnsPanel1.Query = QueryPanel1.Query;

每个Session会初始化一次DbQuery和DbModel对象，但每次回发都会重新创建可视控件（QueryPanel，QueryColumnsPanel等） - 所以你应该在表单加载时分配你的DbQuery对象。

如何在我们的项目中使用Easy Query构建器生成sql查询。

1 个答案: