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1 <% group # Abstract accessor attributes %>
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2
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3 <p class='j'>
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4 If a method returns a scalar value, this attribute can be used to specify how database returns this value.
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5 The <b>ScalarSource</b> attribute take a parameter of the <b>ScalarSourceType</b> type:
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6
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7 <table class='data'>
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8 <tr><th>ScalarSourceType</th><th>Description</th></tr>
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9 <tr><td>DataReader</td><td>Calls the <b>DbManager.ExecuteReader</b> method, and then calls <b>IDataReader.GetValue</b> method to read the value.</td></tr>
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10 <tr><td>OutputParameter</td><td>Calls the <b>DbManager.ExecuteNonQuery</b> method, and then reads value from the <b>IDbDataParameter.Value</b> property.</td></tr>
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11 <tr><td>ReturnValue</td><td>Calls the <b>DbManager.ExecuteNonQuery</b> method, and then reads return value from command parameter collection.</td></tr>
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12 <tr><td>AffectedRows</td><td>Calls the <b>DbManager.ExecuteNonQuery</b> method, and then returns its return value.</td></tr>
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13 </table>
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14 </p>
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15
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16 ScalarSource.cs
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17 <% ..\..\..\HowTo\DataAccess\ScalarSource.cs %>
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18 App.config
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19 <% Doc\Data\App.config %>
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20 <a href="../Data/CreateSql.htm">Create.sql script</a>
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