how to Optimize multiple searches in the table - asp.net-core

Question

I want to select a few fields from the table and search For example, a user records the project name, color project status, project date, and so on
For example, in the search form, I want to select the project name and color of the project status and project date, and fetch the information
But the problem is that I have to apply too many (if)
How can I select and search multiple fields with the least if ?
Please see the image and the codes and help.
if (hesabrsee.Projectid != 0 && red != 0 && yealoo != 0)
{
fraindList = fraindList.Where(p => p.Projectid == hesabrsee.Projectid && p.ControlState == red && p.ControlState == yealoo);
ViewBag.yealoo = "checked";
ViewBag.red = "checked";
return View(fraindList.ToList());
}
<div class="col-md-4 col-xs-12">
<label>نام پروژه</label>
<select class="form-control" id="form_frame" name="Projectid">
<option value="" default="" selected="">انتخاب کنید</option>
#foreach (var item in ViewBag.proList)
{
<option value="#item.projectID">#item.projectName</option>
}
</select>
</div>

Answer 1

You can try to use the following code:
string s = "select * from Hesabrsee where Projectid=" + hesabrsee.Projectid;
s += red != 0 ? "ControlState==red" : "";
s += green != 0 ? "ControlState==green" : "";
var fraindList = _context.Student.FromSqlRaw(s).AsEnumerable();
if (FramDate != null)
{
fraindList = fraindList.Where(l => l.ControlDate.Date >= ConvertDateTime.ConvertShamsiToMiladi(FramDate));
}
if (ToDate != null)
{
fraindList = fraindList.Where(l => l.ControlDate.Date >= ConvertDateTime.ConvertShamsiToMiladi(ToDate));
}
return View(fraindList.ToList());