[英]Connect to sql database
我正在尝试从数据库检索数据到datagridview,但出现异常,
ConnectionString属性尚未初始化。
using (conn = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=""C:\Users\BOB\Documents\Visual Studio 2012\Projects\Login\Login\Student_Marks.mdf"";Integrated Security=True"));
{
using (adap = new SqlDataAdapter("select * from tbl_Students_Marks", conn))
{
DataSet das = new DataSet();
adap.Fill(das);
dataGridView1.DataSource = ds.Tables[0];
}
}
我看到您的代码,发现您放置了“;” 在您启动conn的第一个using语句的末尾
using (conn = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=""C:\Users\BOB\Documents\Visual Studio 2012\Projects\Login\Login\Student_Marks.mdf"";Integrated Security=True"))//; this was the issue
{
using (adap = new SqlDataAdapter("select * from tbl_Students_Marks", conn))
{
DataSet das = new DataSet();
adap.Fill(das);
dataGridView1.DataSource = das.Tables[0];//this must be das not ds
}
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.