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Question

I need to search DataGridView by date. If I enter 2/11/2017 in text box, I want grid to show me rows that contain this date. Date column in my DataGridView is named AppointmentDate and is created in SQL Server. Type of this column is only date.

I saw this, but I am using Entity Framework model, I don't know how to realize it.

    dgvPacientet.CurrentCell = Nothing
    Dim found As Boolean = False
    For Each row As DataGridViewRow In dgvPacientet.Rows
        row.Visible = row.Cells("Dt_terminit").Value = txtData.Text
        If row.Visible Then found = True
    Next
    If Not found Then MsgBox("Item not found")`

Answer 1

Simply show or hide the rows that contain the text you want.

DataGridView1.CurrentCell = Nothing
Dim found as Boolean = false
For Each row As DataGridViewRow In DataGridView1.Rows
   Row.Visible = Not IsDBNull(row.Cells("DT_Terminit").Value) andalso row.Cells("DT_Terminit").Value = TextBox5.Text  
   If Row.Visible then found = true
Next
If Not found Then MsgBox("Item not found")

However you really need to parse that textbox to make sure it is a date first and if that cell contains a true Date, you need to convert the test into a date.

 Dim DT As Date
 If Not Date.TryParse(TextBox5.Text, DT) Then
    MsgBox("Please enter a date") '<-- remove this line if searching on the fly... (as you enter text)
    Exit Sub
 End If

 DataGridView1.CurrentCell = Nothing

 Dim found As Boolean = False
 For Each row As DataGridViewRow In DataGridView1.Rows
    Row.Visible = Not IsDBNull(row.Cells("DT_Terminit").Value) andalso row.Cells("DT_Terminit").Value =DT
    If row.Visible Then found = True
 Next
 If Not found Then MsgBox("Item not found")