c# - 解决错误 "The ConnectionString property has not been initialized."?

Question

我的代码是查看gridview中的所有数据

Web.config代码是

<configuration>
  <connectionStrings>
    <add name="ConStr" connectionString="DataSource=.;Integrated Security=SSPI;Initial catalog=sshopping"/>
  </connectionStrings>
  <system.web>
    <compilation debug="true" targetFramework="4.5"/>
    <httpRuntime targetFramework="4.5"/>
  </system.web>
</configuration>

在外部类中编码

namespace DBAction
{
    public class ViewAction
    {
        public DataSet GetAllData()
        {
                SqlCommand cmd = DataConnection.GetConnection().CreateCommand();
                cmd.CommandText = "Select UserName,Password,RoleName,EmailID,SecurityQuestion,SecurityAnswer,LastLogin from LoginInfo";
                SqlDataAdapter da = new SqlDataAdapter(cmd);
                DataSet ds = new DataSet();  
                da.Fill(ds);
                cmd.Dispose();
                DataConnection.CloseConnection();
                return ds;
        }
    }
}

它在 da.Fill(ds) 行给出错误 将数据源与 gridview 绑定(bind)的代码在页面加载时编码如下。

 DataSet ds = new ViewAction().GetAllData();
        gvLoginInfo.DataSource = ds;
        gvLoginInfo.DataBind();

而数据连接类中的conectionstring代码为

 public static SqlConnection GetConnection()
        {

            if (con == null)
            {
                con = new SqlConnection();
                con.ConnectionString = ConfigurationManager.ConnectionStrings["ConStr"].ConnectionString;
                con.Open();
            }

             return con;
        }

一一错误是

Exception Details: System.ArgumentException: Keyword not supported: 'datasource'.

Source Error:


Line 19:             {
Line 20:                 con = new SqlConnection();
Line 21:                 con.ConnectionString =ConfigurationManager.ConnectionStrings["ConStr"].ConnectionString;
Line 22:                 con.Open();
Line 23:             }

Answer 1

错误仅在 Web.Config 中。请在 connectionString 中的 DataSource 之间加一个空格，如:Data Source。因此您的连接字符串将变为:

 "Data Source=.;Integrated Security=SSPI;Initial catalog=sshopping".