参数'解决'不能为空字符串 [英] The parameter 'addresses' cannot be an empty string
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问题描述
我尝试在asp.net中发送邮件
当管理员批准/拒绝的文档,然后将数据保存到数据库中
像这样
的SeqNo的DocID ApproveID ApproveBy
82 20 3约翰·
83 21 1约翰
84 18 2凯蒂
85 19 1 EMEL
现在我发邮件也
当管理员点击按钮,然后邮件发送给相应的电子邮件ID
这样我显示报时表
可采用DocName的DocID USEREMAIL Uplaodedfile的DocType deptype定义ApproveID
1 ABC def.pdf abcdef@gmail.com PDF小时(在此我设置下拉值(批准/拒绝/待定)
这是按钮code
保护无效的button1_Click(对象发件人,EventArgs的发送)
{
字符串connStr = ConfigurationManager.ConnectionStrings [mydms]的ConnectionString。
的SqlConnection的MySqlConnection =新的SqlConnection(connStr);
如果(mySQLconnection.State == ConnectionState.Closed)
{
mySQLconnection.Open();
的for(int i = 0; I< Repeater2.Items.Count;我++)
{
DropDownList的DropDownListcontrol =((DropDownList的)Repeater2.Items [I] .FindControl(DropDownList4));
标签的docID =((标签)Repeater2.Items [I] .FindControl(DOCID)); CMD的SqlCommand =新的SqlCommand(approveddd的MySqlConnection);
cmd.CommandType = CommandType.StoredProcedure; cmd.Parameters.Add(@的DocID,SqlDbType.Int).value的= Convert.ToInt32((DocId.Text)); cmd.Parameters.Add(@ ApproveID,SqlDbType.Int).value的= Convert.ToInt32(DropDownListcontrol.SelectedValue);
cmd.Parameters.Add(@ ApproveBy,SqlDbType.VarChar,50).value的=
(会话[Login2身份]);
尝试
{
cmd.ExecuteNonQuery();
字符串EMAILID =((标签)Repeater2.Items [I] .FindControl(Label2的))文本。
SendEmailUsingGmail(EMAILID);
}
赶上(异常前)
{
Supvisor.Text =(ex.Message);
}
cmd.ExecuteNonQuery();
// UPDATE APPPROVEID IN DOCUMENTINFO表
//DMSLIB.Doc myDoc =新DMSLIB.Doc();
//myDoc.MarkDocAs(Convert.ToInt16(DocId.Text)
Convert.ToInt32(DropDownListcontrol.SelectedValue));
} }
其他
{
Supvisor.Text =错误;
}
如果(mySQLconnection.State == ConnectionState.Open)
{
mySQLconnection.Close();
}
} 私人无效SendEmailUsingGmail(字符串toEmailAddress)
{
尝试
{
SmtpClient SMTP =新SmtpClient();
smtp.Credentials =新的NetworkCredential(keysketyyyy@gmail.com
sdsdasd);
smtp.Port = 587;
smtp.Host =smtp.gmail.com;
smtp.EnableSsl = TRUE;
消息MAILMESSAGE新= MAILMESSAGE();
message.From =新的MailAddress(keysketyyy@gmail.com);
message.To.Add(toEmailAddress);
message.Subject =在这里写下你的电子邮件的主题;
message.Body =这里写电子邮件的内容;
smtp.Send(消息);
}
赶上(异常前)
{
的Response.Write(发生错误:+ ex.Message.ToString());
}
}
在此行中发生
错误,当我设置一个断点
赶上(异常前)
{
的Response.Write(发生错误:+ ex.Message.ToString());
}
错误
参数地址不能为空字符串。
参数名:地址
解决方案
尝试
message.To.Add(新MailAddress(toEmailAddress));
和验证变量toEmailAddress的内容。
i try to send mail in asp.net when admin approve /reject document then data save into database like this
SeqNo DocID ApproveID ApproveBy
82 20 3 john
83 21 1 john
84 18 2 kety
85 19 1 emel
now i send email also when admin click on button then email send to respective email id like this i show in repeater table
DocID DocName Uplaodedfile UserEmail DocType DepType ApproveID
1 ABC def.pdf abcdef@gmail.com pdf hr (In this i set dropdown values are (approve/reject/pending)
and this is button code
protected void Button1_Click(object sender, EventArgs e)
{
string connStr = ConfigurationManager.ConnectionStrings["mydms"].ConnectionString;
SqlConnection mySQLconnection = new SqlConnection(connStr);
if (mySQLconnection.State == ConnectionState.Closed)
{
mySQLconnection.Open();
for (int i = 0; i < Repeater2.Items.Count; i++)
{
DropDownList DropDownListcontrol = ((DropDownList)Repeater2.Items[i].FindControl("DropDownList4"));
Label DocId = ((Label)Repeater2.Items[i].FindControl("DocId"));
SqlCommand cmd = new SqlCommand("approveddd", mySQLconnection);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("@DocID", SqlDbType.Int).Value = Convert.ToInt32((DocId.Text));
cmd.Parameters.Add("@ApproveID", SqlDbType.Int).Value = Convert.ToInt32(DropDownListcontrol.SelectedValue);
cmd.Parameters.Add("@ApproveBy", SqlDbType.VarChar, 50).Value =
(Session["Login2"]);
try
{
cmd.ExecuteNonQuery();
string emailId = ((Label)Repeater2.Items[i].FindControl("Label2")).Text;
SendEmailUsingGmail(emailId);
}
catch (Exception ex)
{
Supvisor.Text=(ex.Message);
}
cmd.ExecuteNonQuery();
//UPDATE APPPROVEID IN DOCUMENTINFO TABLE
//DMSLIB.Doc myDoc = new DMSLIB.Doc();
//myDoc.MarkDocAs(Convert.ToInt16(DocId.Text),
Convert.ToInt32(DropDownListcontrol.SelectedValue));
}
}
else
{
Supvisor.Text = "Error";
}
if (mySQLconnection.State == ConnectionState.Open)
{
mySQLconnection.Close();
}
}
private void SendEmailUsingGmail(string toEmailAddress)
{
try
{
SmtpClient smtp = new SmtpClient();
smtp.Credentials = new NetworkCredential("keysketyyyy@gmail.com",
"sdsdasd");
smtp.Port = 587;
smtp.Host = "smtp.gmail.com";
smtp.EnableSsl = true;
MailMessage message = new MailMessage();
message.From = new MailAddress("keysketyyy@gmail.com");
message.To.Add(toEmailAddress);
message.Subject = "Write your email subject here";
message.Body = "write the content of the email here";
smtp.Send(message);
}
catch (Exception ex)
{
Response.Write("Error occured: " + ex.Message.ToString());
}
}
error occured in this line when i set a breakpoint
catch (Exception ex)
{
Response.Write("Error occured: " + ex.Message.ToString());
}
error
The parameter 'addresses' cannot be an empty string.
Parameter name: addresses
解决方案
try
message.To.Add(New MailAddress(toEmailAddress));
and verify the content of the variable "toEmailAddress".
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