ConnectionString 属性尚未初始化(小弟我是新手,希望能得到各位的指点)

ConnectionString 属性尚未初始化(我是新手,希望能得到各位的指点)
namespace   admin
{
///   <summary>
///   WebForm1   的摘要说明。
///   </summary>
public   class   WebForm1   :   System.Web.UI.Page
{
protected   System.Web.UI.WebControls.Label   Info_Lb;
protected   System.Web.UI.WebControls.Label   Msg;
protected   System.Web.UI.WebControls.TextBox   txt_name;
protected   System.Web.UI.WebControls.RadioButtonList   Rbt_sex;
protected   System.Web.UI.WebControls.TextBox   txt_idno;
protected   System.Web.UI.WebControls.TextBox   txt_birth;
protected   System.Web.UI.WebControls.TextBox   txt_address;
protected   System.Web.UI.WebControls.TextBox   txt_mobile;
protected   System.Web.UI.WebControls.TextBox   txt_email;
protected   System.Web.UI.WebControls.RequiredFieldValidator   RequiredFieldValidator1;
protected   System.Web.UI.WebControls.TextBox   txt_pass;
protected   System.Web.UI.WebControls.RegularExpressionValidator   RegularExpressionValidator1;
protected   System.Web.UI.WebControls.RequiredFieldValidator   RequiredFieldValidator2;
protected   System.Web.UI.WebControls.LinkButton   btn_OK;
public   string   editid;
public   string   type;
public   string   BindUser;

private   void   Page_Load(object   sender,   System.EventArgs   e)
{
//   在此处放置用户代码以初始化页面
}

#region   Web   窗体设计器生成的代码
override   protected   void   OnInit(EventArgs   e)
{
//
//   CODEGEN:   该调用是   ASP.NET   Web   窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
private   void   Initializecomponent()
{

this.btn_OK.Click   +=   new   System.EventHandler(this.btn_OK_Click);
this.Load   +=   new   System.EventHandler(this.Page_Load);
}

///   <summary>
///   设计器支持所需的方法   -   不要使用代码编辑器修改
///   此方法的内容。
///   </summary>
private   void   InitializeComponent()
{        
this.btn_OK.Click   +=   new   System.EventHandler(this.btn_OK_Click);
this.Load   +=   new   System.EventHandler(this.Page_Load);

}
#endregion

private   void   btn_OK_Click(object   sender,   System.EventArgs   e)
{
string   strRealName   =   this.txt_name.Text.Trim();
string   strPassWord   =   this.txt_pass.Text.Trim();
if(strRealName.Length==0)
{
RequiredFieldValidator1.Enabled=true;
return;
}
if(strPassWord.Length==0)
{
RequiredFieldValidator2.Enabled=true;
}
SqlConnection   MyConn   =   new   SqlConnection(ConfigurationSettings.AppSettings[ "strConnection "]);
                MyConn.Open();
string   sqlstr= "insert   into   [userinformation](userName,userSex,userAddess,userCard,userEmail,userPhone,userBirthDay, "
+   "values( ' "+this.txt_name.Text   + " ', "+   this.Rbt_sex.SelectedValue   + ", "
+   this.txt_address.Text   + ", "+   this.txt_mobile.Text   + ", ' "+   this.txt_email.Text   + " ', ' "