How to Programmatically Show or Hide a Modal Popup Dialog with Server Side Code in Share Point 2013

This article shows you how to programmatically show, hide and pass value from a SharePoint 2013 popup modal dialog with server side code.

C# Code snippet for showing a popup / Modal dialog in SharePoint 2013

 protected void btnShowPopUp_Click(object sender, EventArgs e)
 {
 	// Perform your Server Side Operations Here
 	ShowBasicDialog("PopUp.aspx", "Basic PopUp From Server Side");
 }
 
 private void ShowBasicDialog(string Url, string Title)
 {
 	StringBuilder sb = new StringBuilder();
 	sb.AppendLine(@"<script type=""text/ecmascript"" language=""ecmascript"">");
 	sb.AppendLine(@"ExecuteOrDelayUntilScriptLoaded(openBasicServerDialog, ""sp.js"");");
 	sb.AppendLine(@"    function openBasicServerDialog()");
 	sb.AppendLine(@"    {");
 	sb.AppendLine(@"        var options = {");
 	sb.AppendLine(string.Format( @"            url: '{0}',",Url));
 	sb.AppendLine(string.Format( @"            title: '{0}'",Title));
 	sb.AppendLine(@"        };");
 	sb.AppendLine(@"        SP.UI.ModalDialog.showModalDialog(options);");
 	sb.AppendLine(@"    }");
 	sb.AppendLine(@"</script>");
 	ltScriptLoader.Text = sb.ToString();
 }

C# code to hide a Popup modal dialog

 private void ClosePopUpFromServerSide()
 {
 	ltScript.Text = @"<script type='text/javascript'>window.frameElement.commitPopup();</script>"; 
 }
 protected void btnOk1_Click(object sender, EventArgs e)
 {
 	// Perform your server side operations here 
 	ClosePopUpFromServerSide();
 }

C# code to pass value from Popup to base page

 protected void btnOk2_Click(object sender, EventArgs e)
 {
 	// Perform your server side operations here 
 	System.Collections.Generic.List<string> Data = new System.Collections.Generic.List<string>();
 	Data.Add(txtData1.Text);
 	Data.Add(txtData2.Text);
 	PassDataFromServerSide(Data.ToArray());
 }
 
 private void PassDataFromServerSide(string[] Data)
 {
 	string PopStr = @"<script type='text/javascript'>window.frameElement.commitPopup([DATA]);</script>"; 
 	StringBuilder sb = new StringBuilder();
 	if (Data.Length > 0)
 	{
 		sb.Append(@"new Array(");
 		for (int i = 0; i < Data.Length; i++)
 		{
 			sb.AppendLine(string.Format(@"'{1}'{2}", i, Data[i], i == Data.Length - 1 ? "" : ","));
 		}
 		sb.Append(@")");
 	}
 	ltScript.Text = PopStr.Replace("[DATA]", sb.ToString());
 }