asp.net选择多个表 [英] asp.net select multiple table

问题描述

嗨
任何人都可以帮助我，如何使用一个下拉列表中的多个表，以及另一个下拉列表中的不同字段?
谢谢

Hi
any one can you help me how to use select multiple table from one dropdown list and different field from another dropdown list?
Thanks

推荐答案

您的问题不清楚，但我认为这可能对您有所帮助

使用所需的连接字符串，SqlCommand cmd，SqlDataReader读取器，string selectSQL和2 ComboBox combobox1& combobox2
声明SqlConnection con

your question is not clear, but i think this may help you

declare SqlConnection con with desired connection string, SqlCommand cmd, SqlDataReader reader, string selectSQL and 2 ComboBox combobox1&combobox2

selectSQL = "SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES";
cmd = new SqlCommand(selectSQL, con);
con.Open();
reader = cmd.ExecuteReader();
while (reader.Read())
{
     comboBox1.Items.Add(reader.GetString(0).ToString());
}
reader.Close();

在组合框的SelectedIndexChanged事件中使用以下代码

use below code in SelectedIndexChanged event of combobox

selectSQL = "SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = "+"'"+comboBox1.Text+"'";
cmd = new SqlCommand(selectSQL, con);
reader = cmd.ExecuteReader();
while (reader.Read())
{
     comboBox2.Items.Add(reader.GetString(0).ToString());
}
reader.Close();

--theanil

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