Uncaught SyntaxError: missing ) after argument list

Question

private void MessageBox(string msg)
{
ScriptManager.RegisterClientScriptBlock(this, GetType(), "startscript", "<script>alert('" + msg + "');</script>", false);
}

 

 

protected void btnDelete_OnClick(object sender, ImageClickEventArgs e)

{
string msg = "";
//deleting is violating foreign key constrain
GridViewRow row = (GridViewRow)((ImageButton)sender).NamingContainer;
msg = deleteDetails1.DeleteCourseMaster(Convert.ToInt32(gridReport.Rows[row.RowIndex].Cells[2].Text));
BindGrid();
ClearControls();

MessageBox(msg);// this code is throwing error as  Uncaught SyntaxError: missing ) after argument list

}

 

 

and the msg contains:

SQL Error:<br/>The DELETE statement conflicted with the REFERENCE constraint "FK_VacancyMaster_CourseMaster". The conflict occurred in database "GFR_New", table "dbo.VacancyMaster", column 'CourseID'.
The statement has been terminated.The DELETE statement conflicted with the REFERENCE constraint "FK_VacancyMaster_CourseMaster". The conflict occurred in database "GFR_New", table "dbo.VacancyMaster", column 'CourseID'.
The statement has been terminated. 

 

 

when i directly pass string as

MessageBox("Something");

 

alert box is working for passing msg string throwing error

 

PS: msg is already declared as string and assigned with null

 

 

 

thanks in advance