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POC# Configuration Files
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  1. POC# Configuration Files
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    copied!<p>Okay, so a while ahead I posted how to read other config files of other programs (here is the link <a href="https://stackoverflow.com/questions/938585/open-other-programs-configuration-files">Previous Post</a>. I managed to do it. But now there is another problem. The scenario is like this, I have two programs. Program <strong>A</strong> reads its configuration from a config file and program <strong>B</strong> is only used to modify the contents of the config file which <strong>A</strong> reads. The name of the config file is <em>email.config</em>. It is in the same directory in which program <strong>A</strong> &amp; <strong>B</strong> resides.</p> <p>The problem is that I get path of a file for attachment using open file dialog. If the path points to a file in the same directory, the program works perfect! But if it points to a file outside the directory it throws an exception of type <em>System.NullReferenceException</em>.</p> <p>Here is the code</p> <pre><code>private void saveBtn_Click(object sender, EventArgs e) { try { // save everything and close string attachment = attachTxtBox.Text; var configMap = new ExeConfigurationFileMap { ExeConfigFilename = configFileName }; // it throws exception here when // the path points to a file outside the exes directory Configuration externalConfig = ConfigurationManager.OpenMappedExeConfiguration(configMap, ConfigurationUserLevel.None); externalConfig.AppSettings.Settings["ServerAddress"].Value = serverAddr; externalConfig.AppSettings.Settings["Port"].Value = port; externalConfig.AppSettings.Settings["SSL"].Value = ssl.ToString(); externalConfig.AppSettings.Settings["Sender"].Value = senderAddr; externalConfig.AppSettings.Settings["SenderPassword"].Value = password; externalConfig.AppSettings.Settings["Subject"].Value = subject; externalConfig.AppSettings.Settings["AttachmentPath"].Value = attachment; externalConfig.AppSettings.Settings["Body"].Value = messageBody; // Save values in config externalConfig.Save(ConfigurationSaveMode.Full); Application.Exit(); } catch (System.Exception ex) { MessageBox.Show("Error: " + ex.Message); Application.Exit(); } } </code></pre> <p>The content of <em>email.config</em> is:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8" ?&gt; &lt;configuration&gt; &lt;appSettings file=""&gt; &lt;clear /&gt; &lt;add key="ServerAddress" value="" /&gt; &lt;add key="Port" value="" /&gt; &lt;add key="Sender" value="" /&gt; &lt;add key="SenderPassword" value="" /&gt; &lt;add key="Subject" value="" /&gt; &lt;add key="AttachmentPath" value="" /&gt; &lt;add key="Body" value="" /&gt; &lt;/appSettings&gt; &lt;/configuration&gt; </code></pre> <p>What am I doing wrong here?</p> <p><strong>EDIT:</strong> The value of <em>configFileName</em> is <em>"email.config"</em></p>
 

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