实体类生成器v1.0发布

先来无事,做了一个小工具:实体类生成器。

  • 仅支持Sql  Server数据库;
  • 可以根据所选数据库的数据表,生成对应的实体类;
  • 命名规则进行了统一。

程序截图:

图1:

截图2:


 

下面总结下遇到的问题:

  1. winform中DataGridView数据绑定
    和web开发中的Dropdownlist不同,绑定winform中的下拉框不需要DataBind()事件,这是坑1;
    第二,绑定的时候:
    /// <summary>
    /// cbChooseTable的触发事件
    /// </summary>
    private void cbChooseTable_SelectedIndexChanged(object sender, EventArgs e)
    {
        //get result table
        DataTable dt = GetTableContent();
    
        //convert db type to c# type
        for (int i = 0; i < dt.Rows.Count; i++)
        {
            dt.Rows[i][1] = ConvertType(dt.Rows[i][1].ToString());
        }
    
        //clear, in case of repeat
        this.dgvTableInfo.Columns.Clear();
    
        //bind coloume
        DisplayCol(dgvTableInfo, "ColumnName", "属性");
        DisplayCol(dgvTableInfo, "Type", "类别");
        DisplayCol(dgvTableInfo, "ColumnDesc", "说明");
    
        dgvTableInfo.DataSource = dt;
    }

    注意DisplayCol()方法:

    /// <summary>
    /// 设置DataGridView的列的显示
    /// 类似前台的列编辑
    /// </summary>
    /// <param name="dgv"></param>
    /// <param name="dataPropertyName">属性名称,对应数据库中字段名</param>
    /// <param name="headerText">显示的文字</param>
    private void DisplayCol(DataGridView dgv, string dataPropertyName, string headerText)
    {
        dgv.AutoGenerateColumns = false;
        DataGridViewTextBoxColumn obj = new DataGridViewTextBoxColumn();
        obj.DataPropertyName = dataPropertyName;
        obj.HeaderText = headerText;
        obj.Name = dataPropertyName;
        obj.Resizable = DataGridViewTriState.True;
        dgv.Columns.AddRange(new DataGridViewColumn[] { obj });
    }

     

  2. comboBox_SelectedIndexChanged下拉事件的发生时间
    和web开发不同,下拉框不是只有在下拉的时候才触发,而是每当赋值数据源的时候;或者设置DisplayMember属性的时候都会触发;
    不信你可调试下!
  3. Sql Server中,查询所有数据库名字的语句
    --查询所有数据库的名字
    select name as 'name' from master..sysdatabases order by name
  4. Sql Server中,查询数据库中的所有表:
    --查询数据库中的所有表
    use master;
    Select   name   from   sysobjects   where   xtype= 'u '
  5. Sql Server中,根据每个数据表的定义结构;
    use {0}; SELECT
        ColumnName=C.name,
        Type=T.name,
        ColumnDesc=ISNULL(PFD.[value],N'')
    FROM sys.columns C
        INNER JOIN sys.objects O
            ON C.[object_id]=O.[object_id]
                AND O.type='U'
                AND O.is_ms_shipped=0
        INNER JOIN sys.types T
            ON C.user_type_id=T.user_type_id
        LEFT JOIN sys.default_constraints D
            ON C.[object_id]=D.parent_object_id
                AND C.column_id=D.parent_column_id
                AND C.default_object_id=D.[object_id]
        LEFT JOIN sys.extended_properties PFD
            ON PFD.class=1 
                AND C.[object_id]=PFD.major_id 
                AND C.column_id=PFD.minor_id
    --             AND PFD.name='Caption' -- 字段说明对应的描述名称(一个字段可以添加多个不同name的描述)
        LEFT JOIN sys.extended_properties PTB
            ON PTB.class=1 
                AND PTB.minor_id=0 
                AND C.[object_id]=PTB.major_id
    --             AND PFD.name='Caption' -- 表说明对应的描述名称(一个表可以添加多个不同name的描述)
    
        LEFT JOIN                       -- 索引及主键信息
        (
            SELECT 
                IDXC.[object_id],
                IDXC.column_id,
                Sort=CASE INDEXKEY_PROPERTY(IDXC.[object_id],IDXC.index_id,IDXC.index_column_id,'IsDescending')
                    WHEN 1 THEN 'DESC' WHEN 0 THEN 'ASC' ELSE '' END,
                PrimaryKey=CASE WHEN IDX.is_primary_key=1 THEN N''ELSE N'' END,
                IndexName=IDX.Name
            FROM sys.indexes IDX
            INNER JOIN sys.index_columns IDXC
                ON IDX.[object_id]=IDXC.[object_id]
                    AND IDX.index_id=IDXC.index_id
            LEFT JOIN sys.key_constraints KC
                ON IDX.[object_id]=KC.[parent_object_id]
                    AND IDX.index_id=KC.unique_index_id
            INNER JOIN -- 对于一个列包含多个索引的情况,只显示第1个索引信息
            (
                SELECT [object_id], Column_id, index_id=MIN(index_id)
                FROM sys.index_columns
                GROUP BY [object_id], Column_id
            ) IDXCUQ
                ON IDXC.[object_id]=IDXCUQ.[object_id]
                    AND IDXC.Column_id=IDXCUQ.Column_id
                    AND IDXC.index_id=IDXCUQ.index_id
        ) IDX
            ON C.[object_id]=IDX.[object_id]
                AND C.column_id=IDX.column_id
    
    WHERE O.name=N'{1}'       -- 如果只查询指定表,加上此条件
    ORDER BY O.name,C.column_id

     

PS: 
下载地址:EntityClassGenerator.exe

源代码:https://github.com/FrankFan/EntityClassGenerator

 

posted on 2013-05-17 20:44  Frank.Fan  阅读(784)  评论(0编辑  收藏  举报