Make exception message more helpful. Fixes #206

bgrainger · bgrainger · commit 7b17330fe2d7 · 2017-03-26T15:01:44.000-07:00
diff --git a/src/MySqlConnector/MySqlClient/MySqlStatementPreparer.cs b/src/MySqlConnector/MySqlClient/MySqlStatementPreparer.cs
@@ -55,7 +55,7 @@ protected override void OnNamedParameter(int index, int length)
 				if (parameterIndex != -1)
 					DoAppendParameter(parameterIndex, index, length);
 				else if ((m_preparer.m_options & StatementPreparerOptions.AllowUserVariables) == 0)
-					throw new MySqlException("Parameter '{0}' must be defined.".FormatInvariant(parameterName));
+					throw new MySqlException("Parameter '{0}' must be defined. To use this as a variable, set 'Allow User Variables=true' in the connection string.".FormatInvariant(parameterName));
 			}
 
 			protected override void OnPositionalParameter(int index)

Original file line number	Diff line number	Diff line change
`@@ -55,7 +55,7 @@ protected override void OnNamedParameter(int index, int length)`
`55`	`55`	`if (parameterIndex != -1)`
`56`	`56`	`DoAppendParameter(parameterIndex, index, length);`
`57`	`57`	`else if ((m_preparer.m_options & StatementPreparerOptions.AllowUserVariables) == 0)`
`58`		`- throw new MySqlException("Parameter '{0}' must be defined.".FormatInvariant(parameterName));`
	`58`	`+ throw new MySqlException("Parameter '{0}' must be defined. To use this as a variable, set 'Allow User Variables=true' in the connection string.".FormatInvariant(parameterName));`
`59`	`59`	`}`
`60`	`60`
`61`	`61`	`protected override void OnPositionalParameter(int index)`