Object Reference Error In Drop Down List

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Hi, all

Here my problem is i dont know how to display the data from DB in database

My Code is

SQL

ddlprivelege.Items.Insert(0, new ListItem("User", "0"));
            ddlprivelege.Items.Insert(1, new ListItem("Enroller", "1"));
            ddlprivelege.Items.Insert(2, new ListItem("Admin", "2"));
            ddlprivelege.Items.Insert(3, new ListItem("SuperAdmin", "3"));
            ddlprivelege.Items.FindByValue(Dtab.Rows[0]["Privilege"].ToString()).Selected = true;

when i try this i got object ref error how to make it easy

Thanks...

Posted 19-Aug-14 20:35pm

prasanna.raj

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Mayank Vashishtha 20-Aug-14 2:41am

What in the world are you trying to do? It's unclear. Use Improve Question widget and make it more clear to understand.

4 solutions

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Sharmanuj · Accepted Answer · 2014-08-19T20:56:00

Solution 3

check whether you have data in Dtab or not.

C#

if(Dtab!=null && Dtab.Rows.Count>0)
{
ddlprivelege.Items.FindByValue(Dtab.Rows[0]["Privilege"].ToString()).Selected = true;
}

Posted 19-Aug-14 20:56pm

Sharmanuj

v2

sankarsan parida · Accepted Answer · 2014-08-19T20:50:00

If Dtab.Rows[0]["Privilege"].ToString() this returns Text then try to use

ddlprivelege.Items.FindByText(Dtab.Rows[0]["Privilege"].ToString()).Selected = true;

If Dtab.Rows[0]["Privilege"].ToString() this returns ID then try to use

ddlprivelege.Items.FindByValue(Dtab.Rows[0]["Privilege"].ToString()).Selected = true;

And you have to sure Dtab.Rows[0]["Privilege"].ToString() value should exists in dropdown from your text or id of inserted data

shibashish mohanty · Accepted Answer · 2014-08-19T20:51:00

Solution 2

check null value for Dtab like
if(Dtab!=null){}

Posted 19-Aug-14 20:51pm

shibashish mohanty

mukesh.netdev · Accepted Answer · 2014-08-19T21:41:00

Solution 4

Use this code...

ddlEmployee.Items.FindByText(Dtab.Rows[0]["Privilege"].ToString()).Selected = true;

thanks.

Posted 19-Aug-14 21:41pm

mukesh.netdev