combobox Data Binding From SQL Query using C# windows application

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how can i make Data Binding in combobox from sql server query (

SQL

select id , name from town where countryid = combobox2.selectedvalue

)
and display member = name
and value member = id
and please write a view of code
thanks for our effort
best regards

Posted 7-Mar-15 22:25pm

Mohamed-Hmy

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Kornfeld Eliyahu Peter 8-Mar-15 5:14am

Beside the mess in your question, What have you tried?[^]

Mohamed-Hmy 8-Mar-15 6:06am

I Tried To Make Data Binding in combo box based on another combo box
from Sql Query
question about ... how can i do this using C# Windows application
i am beginner in c# windows application
best regards

1 solution

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Kochathu Thomas Tinu · Accepted Answer · 2015-03-08T01:37:00

SqlConnection con=new SqlConnection("your_connection_string");
SqlCommand cmd=new SqlCommand();
SqlDataAdapter ada=new SqlDataAdapter();
DataTable dt=new DataTable();

/* Write this code inside the first combobox click event */
try{
cmd.Connection=con;
cmd.CommandText="select id , name from town where countryid ="+ combobox1.selectedvalue;
ada.SelectCommand=cmd;
ada.Fill(dt);
if(dt.Rows.Count>0)
{
combobox2.DataSource=dt;
combobox2.DisplayMember="name";
combobox2.ValueMember="id";
}
else
{

}
}
catch(Exception exp)
{

}