how to pass null value to label in asp.net

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how to pass null value to label in asp.net??

C#

label.Text =null;
label.Text="";
label.Text=DBNULL;

not working?????

Posted 11-Oct-12 0:12am

Hasiya

Updated 11-Oct-12 0:38am

Kenneth Haugland

v2

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Toniyo Jackson 11-Oct-12 6:20am

Are you telling that label.Text="" also not working?

3 solutions

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Dylan Morley · Answer 1 · 2012-10-11T00:15:00

Solution 1

C#

label.Text = string.Empty;

If you want a label to display 'empty', just assign string.Empty.

Posted 11-Oct-12 0:15am

Dylan Morley

Comments

Hasiya 11-Oct-12 6:17am

label.Text = string.Empty; not working

Dylan Morley 11-Oct-12 6:20am

Trust me, it works. What do you even mean 'not working'? Does it error - do you get an exception? Post what code you have, and what you mean by it's not working

Hasiya 11-Oct-12 6:23am

No...i want to pass null value to datatable.
this is my list
List<webcontrol> controllList = new List<webcontrol>();
controllList.Add(lblgettime);

i wnat to pass lblgettime to null value..

Toniyo Jackson 11-Oct-12 6:32am

Use System.DBNull.Value to pass Null value to database.

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 2 · 2012-10-11T01:41:00

Solution 3

You need to pass DbNull.Value for DataTime field in this case.
Please refer How to pass the null value to datetime datatype in asp.net?[^] for the same type of issue.

Thanks...

Posted 11-Oct-12 1:41am

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

AnkitGoel.com · Answer 3 · 2012-10-11T00:23:00

Solution 2

if you set null label text will always be blank ("") and not null. hence, you can use the following:-

C#

protected void Page_Load(object sender, EventArgs e)
{
    Label1.Text = string.Empty ; // OR  Label1.Text = null ; 
    Label2.Text = (String.IsNullOrEmpty(Label1.Text) ? "null" : "not null");
}

Posted 11-Oct-12 0:23am

AnkitGoel.com

Updated 11-Oct-12 0:37am

v2

Comments

Hasiya 11-Oct-12 6:34am

not working

Hasiya 11-Oct-12 6:39am

List<sqlparameter> parameters = new List<sqlparameter>();
parameters.Add(new SqlParameter("@couriercode", SqlDbType.VarChar, 50));
parameters.Add(new SqlParameter("@Phonenum", SqlDbType.Int));
parameters.Add(new SqlParameter("@receivedTime", SqlDbType.DateTime));
parameters.Add(new SqlParameter("@gettime", SqlDbType.DateTime));
parameters.Add(new SqlParameter("@Remarks", SqlDbType.VarChar, 200));
parameters.Add(new SqlParameter("@Status", SqlDbType.Int));

List<webcontrol> controllList = new List<webcontrol>();
controllList.Add(dropdowncourier);
controllList.Add(dropdowngetphone);
controllList.Add(lbltime);
controllList.Add(lblgettime);
controllList.Add(txtremarks);

Hasiya 11-Oct-12 6:40am

I want to pass null value to lblgettime,