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使用多个Sql表中的唯一数据值字段绑定下拉列表？

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我想从多个SqlDatabase表中选择多个列来将DropDownLists与唯一数据值字段绑定 .

这是我的C＃代码，使用SqlQuery从Table1中选择多个列：

// Create a dropdownlist inside the dynamically created panel and insert in the 1st row 1st cell of dynamic html table
var DDL = new WebForms.DropDownList();
DDL.ID = "MainDDL";
SqlDataSource da = new SqlDataSource();
da.ConnectionString = connection;
string item = "--Select--";
da.SelectCommand = "SELECT DATA_TYPE + '_' + convert(varchar(10), ROW_NUMBER() OVER(ORDER BY DATA_TYPE))as DATA_TYPE, COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE (TABLE_NAME = 'MyTable1' AND COLUMN_NAME IN ('Column1','Column2','Column3','Column4','Column5'))";
DDL.DataSource = da;
DDL.DataTextField = "COLUMN_NAME";
DDL.DataValueField = "DATA_TYPE";
DDL.DataBind();

Solution Required: 要从多个Sql表中选择多个列：

如何从Mytable2中选择column1也在以下Sql查询SELECT DATA_TYPE'_'转换（varchar（10），ROW_NUMBER（）OVER（ORDER BY DATA_TYPE））为DATA_TYPE，COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE（TABLE_NAME ='MyTable1' AND COLUMN_NAME IN（'Column1'，'Column2'，'Column3'，'Column4'，'Column5'））

c# sql sql-server

1 回答

  • 1

    Q: "How to include Mytable2 and its column1 in the following Sql Query"

    A:

    SELECT 
    DATA_TYPE + '_' + convert(varchar(10), ROW_NUMBER() OVER(ORDER BY DATA_TYPE))as DATA_TYPE, 
    COLUMN_NAME 
FROM INFORMATION_SCHEMA.COLUMNS 
WHERE 
    (TABLE_NAME = 'MyTable1' AND COLUMN_NAME IN ('Column1','Column2','Column3','Column4','Column5'))
    OR
    (TABLE_NAME = 'MyTable2' AND COLUMN_NAME IN ('Column1'))
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