下拉框用于选择另一个下拉框 [英] drop down box use to how to select another drop down box

问题描述

我有3个下拉框国家，州，城市。如果我选择印度在国家我应该得到印度州的状态，如果我选择州的AP，那么我应该得到城市的AP城市。这些数据在一个表中。如何选择此下拉列表

解决方案

您好，



请确保您有单独的数据表作为最佳实践。



如需参考样本，请查看以下链接。



http://www.dotnetfox.com/articles/ajax-cascading-dropdown-example- with-database-in-Asp-Net-1078.aspx [ ^ ]





< a href =http://www.aspsnippets.com/Articles/Creating-Cascading-DropDownLists-in-ASP.Net.aspx> http://www.aspsnippets.com/Articles/Creating-Cascading-DropDownLists-in -ASP.Net.aspx [ ^ ]



http://www.aspdotnet-suresh.com/2011/01/introduction-here-i-will- explain-how-to.html [ ^ ]





http://www.asp.net/web-forms/overview/ajax -control-toolkit / cascadingdropdown / using-cascadingdropdown-with-a-database-cs [ ^ ]



对于表格设计请参考以下链接。



http://stackoverflow.com/questions/10971300/what-is-the-best-way-to-design-a-city-state-country-table [ ^ ]



http://community.sitepoint.com/t/database- normalization-city-and-country-tables-etc / 35444/4 [ ^ ]



http://stackoverflow.com/questions/2007447/best-database-design-for-city-zip-state-tables [ ^ ]

I having 3 drop down box "country", "State", "city". if i select "India" in country i should get states of India in state and if i select the "AP" in state then i should get the cities of AP in city. These data are in one table . How can i select this drop down

解决方案

Hi,

Please make sure you have data in separate table as a best practice.

For sample reference check the below links .

http://www.dotnetfox.com/articles/ajax-cascading-dropdown-example-with-database-in-Asp-Net-1078.aspx[^]


http://www.aspsnippets.com/Articles/Creating-Cascading-DropDownLists-in-ASP.Net.aspx[^]

http://www.aspdotnet-suresh.com/2011/01/introduction-here-i-will-explain-how-to.html[^]


http://www.asp.net/web-forms/overview/ajax-control-toolkit/cascadingdropdown/using-cascadingdropdown-with-a-database-cs[^]

For table design please refer below links .

http://stackoverflow.com/questions/10971300/what-is-the-best-way-to-design-a-city-state-country-table[^]

http://community.sitepoint.com/t/database-normalization-city-and-country-tables-etc/35444/4[^]

http://stackoverflow.com/questions/2007447/best-database-design-for-city-zip-state-tables[^]

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