70-305 Developing and Implementing Web Applications with Microsoft Visual Basic.NET
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Demo Question 4.
You work as the Web developer at EliteCertify.com. To obtain the CGPA for college students in a text format, you must determine which code segment sets the Text property of a TextBox control to the value of the @CGP
A. TextBox1.Text = (string) myCommand.Parameters("@CGPA").Value;
B. TextBox1.Text = myCommand.Parameters("@CGPA").Value.ToString();
C. TextBox1.Text = myCommand.Parameters("@CGPA").ToString();
D. TextBox1.Text = myCommand.Parameters("@CGPA").SourceColumn;
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Answer: A
The Value property of the SqlParameter class returns the value of the specified output parameter. The
(string) typecast ensures that the value is a string before assigning the value to the text box's Text property.
It is invalid syntax to append ToString to the Value property of a SqlParameter object.
The ToString property of a SqlCommand object will return the parameter name, not the value. The
SourceColumn property will return the column name that is used for the Value property.
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