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POdatagridview rowvalidating cancel
 

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    <p>I've seen several posts here and on other sites that are similar to my question/problem, but have never really seen anything directly on-target and with a good answer (if I missed one in my search, please point me to it!). Please forgive me if this is long, but I want to give as complete/accurate a descriptions as I can... Thanks in advance for your help!!</p> <p>I have a Windows form with side-by-side datagridviews (dgdApplications &amp; dgdEligibleFiles). dgdApplications is set for FullRowSelect and validation (CausesVailidation = true). dgdEligibleFiles contains a list of files &amp; file info, and a checkbox column - if a row is checked, the file it represents is "assigned" to the selected row in dgdApplications (a row/application in dgdApplications may have many files assigned to it). If a user has altered his assignments in dgdEligibleFiles (checked/unchecked one/more rows) without clicking the Save button at form-bottom, and then clicks another row in dgdApplications, I currently use dgdApplications_RowValidating to pop a messagebox and verify that the user wants to proceed to the newly-selected application/row without saving changes. If the "No" button is clicked, I call e.Cancel to stay in the original row. If "Yes", I want to proceed with dgdApplications_MouseClick on the new row, which will do the following: clear the checkboxes in dgdEligibleFiles, retrieve the list of files for the newly selected app in dgdApplications, and update checked/selected values in the underlying list bound to dgdEligibleFiles (followed by dgdEligibleFiles.Refresh()).</p> <p>My problem: When the messagebox is displayed in dgdApplications.RowValidating and the user chooses "Yes" to continue (abandoning changes in dgdEligibleFiles and going to the new row in dgdApplications), dgdApplications_MouseClick does not get executed and nothing changes in dgdEligbleFiles. How can I get dgdApplications_MouseClick to execute? </p> <pre><code>void dgdApplications_RowValidating(object sender, DataGridViewCellCancelEventArgs e) { if (assgnmtChgd &amp;&amp; (MessageBox.Show("You will lose unsaved changes - continue?", "", MessageBoxButtons.YesNo) == DialogResult.No)) { e.Cancel = true; return; } } /// &lt;summary&gt; /// Handles the selection of an application when it's datagridview row is clicked /// &lt;/summary&gt; /// &lt;param name="sender"&gt;&lt;/param&gt; /// &lt;param name="e"&gt;&lt;/param&gt; private void dgdApplications_MouseClick(object sender, MouseEventArgs e) { // Reset the DisplayAssignedOnly checkbox so all dgdEligibleFiles rows will be unhidden and displayed chkDispAssgndOnly.CheckState = CheckState.Unchecked; ClearFilesGrid(); dgdApplications.CurrentRow.Selected = true; currentAppRowID = dgdApplications.CurrentRow.Index; currentAppRecID = (int)dgdApplications.CurrentRow.Cells["appIDColumn"].Value; dgdEligibleFiles.ClearSelection(); dgdEligibleFiles.CurrentCell = null; MatchAssignedFiles(currentAppRecID); dgdEligibleFiles.Refresh(); //Set the indicator showing that no assignments have been changed assgnmtChgd = false; } </code></pre>
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