// Invoked when user right click one message template and chose to delete that message template.
private void ToolStripMenuItemDelMessageTemplate_Click(object sender, EventArgs e)
{
TreeNode node = treeViewMessageTemplate.SelectedNode;
if (node == null)
{
return;
}
if (node.Tag == null)
{
return;
}
if (node.Tag.GetType() != typeof(MessageTemplateType))
{
return;
}
MessageTemplateType messageTemplate = (MessageTemplateType)node.Tag;
if (messageTemplate == null)
{
return;
}
MessageTemplateDAL.DeleteOneMessageTemplate(messageTemplate.TemplateId);
// Find the category node.
TreeNode[] categoryNodes = treeViewMessageTemplate.Nodes.Find(messageTemplate.TemplateCategoryId.ToString(), false);
if (categoryNodes.Length > 0)
{
categoryNodes[0].Nodes.Remove(node);
}
}
// Delete a message template category, if there are any message templates under
// this category, prompt user.
private void ToolStripMenuItemDelCategory_Click(object sender, EventArgs e)
{
TreeNode node = treeViewMessageTemplate.SelectedNode;
if (node == null)
{
return;
}
if (node.Tag == null)
{
return;
}
if (node.Tag.GetType() != typeof(MessageTemplateCategoryType))
{
return;
}
MessageTemplateCategoryType categoryType = (MessageTemplateCategoryType)node.Tag;
int categoryId = categoryType.CategoryId;
DataTable dtMessageTemplates = MessageTemplateDAL.GetAllMessageTemplatesWithCategoryId(categoryId);
if (dtMessageTemplates.Rows.Count > 0)
{
if (MessageBox.Show(string.Format("确认删除主题 {0}？ 我们将删除所有隶属该主题的消息模板",
categoryType.CategoryName), "请确认",
MessageBoxButtons.YesNo, MessageBoxIcon.Question)
== System.Windows.Forms.DialogResult.No)
{
return;
}
}
// Either cases:
// 1) The category has message templates and user confirmed to delete the category.
// 2) The category has no message templates.
// Delete all the relevant message templates first.
foreach (DataRow dr in dtMessageTemplates.Rows)
{
int messageTemplateId = StringUtil.GetSafeInt(dr["TemplateId"]);
MessageTemplateDAL.DeleteOneMessageTemplate(messageTemplateId);
}
MessageTemplateCategoryDAL.DeleteOneMessageTemplateCategory(categoryType.CategoryId);
treeViewMessageTemplate.Nodes.Remove(node);
}