错误1'System.Data.SqlClient ... [英] Error 1 'System.Data.SqlClient...

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问题描述

我收到以下错误错误1'System.Data.SqlClient.SqlConnection'是'类型',但在下面的代码中使用像'变量',请帮助



  string  imgLoc =  ; 

public Retrieve()
{
InitializeComponent();
}

private void 浏览( object sender,RoutedEventArgs e)
{
SqlConnection cn = SqlConnection( global :: DatabaseApp.Properties。 Settings.Default.Database1ConnectionString);

尝试
{
OpenFileDialog dlg = new 打开文件对话框();
dlg.Filter = JPG文件(* .jpg)| * .jpg | GIF文件(*。 gif)| * .gif |所有文件(*。*)| *。*;
dlg.Title = 选择学生照片;
if (dlg.ShowDialog()== System.Windows.Forms.DialogResult.OK)
{
imgLoc = dlg。 FileName.ToString();
picStud.ImageLocation = imgLoc;
}
}
catch (Exception ex)
{
System.Windows.MessageBox.Show( ex.Message);
}
}

private SqlConnection SqlConnection( string p)
{
throw new NotImplementedException();
}

解决方案

你在<缺少 new 这个词pre> SqlConnection cn = SqlConnection(global :: DatabaseApp.Properties.Settings.Default.Database1ConnectionString);

ie

 SqlConnection cn = new SqlConnection(global :: DatabaseApp.Properties.Settings.Default.Database1ConnectionString); 


Am getting the following error "Error 1 'System.Data.SqlClient.SqlConnection' is a 'type' but is used like a 'variable'" in the below code kindly help

string imgLoc = "";
        
        public Retrieve()
        {
            InitializeComponent();
        }

        private void Browse(object sender, RoutedEventArgs e)
        {
            SqlConnection cn = SqlConnection(global::DatabaseApp.Properties.Settings.Default.Database1ConnectionString);

            try
            {
                OpenFileDialog dlg = new OpenFileDialog();
                dlg.Filter = "JPG Files (*.jpg)|*.jpg|GIF Files (*.gif)|*.gif|All Files(*.*)|*.*";
                dlg.Title = "Select Student Picture";
                if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                {
                    imgLoc = dlg.FileName.ToString();
                    picStud.ImageLocation = imgLoc;
                }
            }
            catch(Exception ex)
            {
                System.Windows.MessageBox.Show(ex.Message);
            }
        }

        private SqlConnection SqlConnection(string p)
        {
            throw new NotImplementedException();
        }

解决方案

You are missing the word new in

SqlConnection cn = SqlConnection(global::DatabaseApp.Properties.Settings.Default.Database1ConnectionString);

i.e.

SqlConnection cn = new SqlConnection(global::DatabaseApp.Properties.Settings.Default.Database1ConnectionString);


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