executescalar null check vb.net

I try to avoid comparing a string to Nothing, even though it does work in V...

I try to avoid comparing a string to Nothing, even though it does work in VB. The Visual dwn.220.v.ua runtime evaluates Nothing as an empty.

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ExecuteScalar() if lEmployeeDesignation IsNot Nothing AndAlso You could als...

ExecuteScalar() if lEmployeeDesignation IsNot Nothing AndAlso You could also put in a Count(EmployeeDesignation)=0 to check scenario 3.

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because the food table is empty and the max(food) is null ExecuteScalar If ...

because the food table is empty and the max(food) is null ExecuteScalar If IsDBNull(Result) Then 'HANDLE NULL Else 'HAS A VALUE End NET through * Please mark you thread resolved using the Thread Tools above. PLEASE INDICATE WHAT VERSION OF VB YOU USE! Forum Test dwn.220.v.ua Check if an object is null or nothing-VBForums.

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Checking if executescalar returns a result in dwn.220.v.ua Filed under. a d...

Checking if executescalar returns a result in dwn.220.v.ua Filed under. a database so you would assume it's DBNull, but if there is an empty table.

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Hi, I am writing an app to display images displayed in a SQL server varbina...

Hi, I am writing an app to display images displayed in a SQL server varbinary table. All is going well, as the guts of the work are happening.

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My problem is that if the value from the database is null, the check Execut...

My problem is that if the value from the database is null, the check ExecuteScalar(); I get the "Specified Cast is Not Valid" exception on that line. . Net because for the same problem Nullable types were introduced in.

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hi everyone i need to check if the cell holds a null value i've Execut...

hi everyone i need to check if the cell holds a null value i've ExecuteScalar returns the first column of the first row in the result set, or a null .. I forgot that this is about Visual Basic and you should check for NULL like this.

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ExecuteScalar returns null (ex dwn.220.v.ua programmer): dwn.220.v.ua progr...

ExecuteScalar returns null (ex dwn.220.v.ua programmer): dwn.220.v.ua programmer). Posted 20 January - PM. be sure to check against null.

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iScorecardId = 1; else iScorecardId = dwn.220.v.ua32(dwn.220.v.uaeScalar())...

iScorecardId = 1; else iScorecardId = dwn.220.v.ua32(dwn.220.v.uaeScalar()) + 1; Is there another way to check if ExecuteScalar returns NULL?

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I don't know about C#, but in VB you can't test ExecuteScalar = n...

I don't know about C#, but in VB you can't test ExecuteScalar = null like that - you have HasRows to check if the query returns a result or not.

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If you really want to test for null, don't return the value as an int....

If you really want to test for null, don't return the value as an int. ExecuteScalar(); int myValue; if (nullableValue == null || nullableValue == dwn.220.v.ua) VB has a very useful function, IsNumeric. Net method is a.

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how to check if DataReader is null or not in dwn.220.v.ua?? . one value in ...

how to check if DataReader is null or not in dwn.220.v.ua?? . one value in your query, you can use ExecuteScalar instead of using a data reader.

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Net. All the three functions i.e. ExecuteNonQuery, ExecuteScalar and return...

Net. All the three functions i.e. ExecuteNonQuery, ExecuteScalar and returned as NULL since there's nothing returned from the UPDATE query. How to bind GridView with DataReader in dwn.220.v.ua using C# and dwn.220.v.ua

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Execute Scalar will return first row first column value i.e. it will return...

Execute Scalar will return first row first column value i.e. it will return single Once table designed in database enter some dummy data to test.

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ExecuteScalar() in SqlCommand Object is used for get a single value from Da...

ExecuteScalar() in SqlCommand Object is used for get a single value from Database after its execution. If the Result Set is empty it will return a Null reference.

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