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shemayb
Posting Yak Master
159 Posts |
 Posted - 2007-08-13 : 14:18:10
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| What is meants by this exception: system.NullReferenceException object reference not set to an instance of an object?thanks!Funnyfrog |
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chrisrock
Starting Member
12 Posts |
Posted - 2007-08-13 : 14:40:57
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| One of your defined objects is null and you're trying to use it.For instance:System.Data.Sql.SqClient.SqlConnection cn;cn.Open(); <-- this will cause that error because cn has not been instantiated yet.This will work:System.Data.Sql.SqClient.SqlConnection cn = new System.Data.Sql.SqClient.SqlConnection("my connection string here");cn.Open(); Do you have the code where this is happening? |
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shemayb
Posting Yak Master
159 Posts |
Posted - 2007-08-13 : 15:04:17
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| This is my code: if (rdoRSO.Checked==true) dv = Physicians.GetPhysiciansDropdown(AgencyId, BranchId, lookupchar); else dv = Physicians.GetPTOassignedPhysiciansDropdown(AgencyId, BranchId, lookupchar, patientId, patientIntakeId);When i will put this one if (rdoRSO.Checked==true) in my code i will have that error. What should i do?Funnyfrog |
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jhermiz
3564 Posts |
Posted - 2007-08-13 : 15:23:46
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| Show us the code before the if, how do you instantiat the rdoRSO object, what is its type, etc. etc.Programmers HowTo's -- [url]http://jhermiz.googlepages.com[/url] |
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shemayb
Posting Yak Master
159 Posts |
Posted - 2007-08-13 : 15:29:16
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| if (rdoRSO.Checked==true),this is a radiobutton..i don't know how to instantiate a radiobutton in this case..i haven't instantiated it..Funnyfrog |
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jhermiz
3564 Posts |
Posted - 2007-08-13 : 15:33:08
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| ok a radio button is throwing this?try justif(rdoRSO.Checked) { }Programmers HowTo's -- [url]http://jhermiz.googlepages.com[/url] |
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shemayb
Posting Yak Master
159 Posts |
Posted - 2007-08-13 : 15:36:53
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| I want to place my if statement inside a function that was called during the loading of the page.Is it okey to place it inside a function instead of inside the radiobutton event?Funnyfrog |
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shemayb
Posting Yak Master
159 Posts |
Posted - 2007-08-13 : 17:12:50
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| when i run the debug my if(rdoRSO.Checked)code has a null value..How can i put a value to it?Funnyfrog |
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system.NullReferenceException