How do I filter records by supplying initial date and final date?

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I'm developing a C# .Net WindowsForm application in Visual Studio 2015. I'm trying to filter records by supplying initial and final dates from TextBoxes on a Form when I click a button. Can you please take a look at my code and tell me what's wrong? I really appreciate it. Thanks a lot!

What I have tried:

private void buttonFilter_Click(object sender, EventArgs e)
{
    try
    {
        if (string.IsNullOrEmpty(textBoxDataIni.Text) | string.IsNullOrEmpty(textBoxDataFin.Text))
        {
            qry_retornosBindingSource.Filter = string.Empty;
        }
        else
        {

            qry_retornosBindingSource.Filter = string.Format("data >= {0}%' & data <= '{1}%'", textBoxDataIni.Text, textBoxDataFin.Text);
            this.qry_retornosTableAdapter.Fill(this.dBpetControlDataSet.qry_retornos);
        }
    }
    catch (Exception)
    {
    }
}

Posted 14-Sep-18 10:40am

JC Carmo

Updated 14-Sep-18 11:57am

v2

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phil.o 14-Sep-18 16:49pm

Are you storing datetimes as strings in your database?

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JC Carmo · Accepted Answer · 2018-09-14T11:58:00

I solved the problem. I had to Convert.ToDateTime the TextBox Texts and fix the code to filter the records. SEe the correct code below:

private void buttonFilter_Click(object sender, EventArgs e)
{
    try
    {
        if (string.IsNullOrEmpty(textBoxDataIni.Text) || string.IsNullOrEmpty(textBoxDataFin.Text))
        {
            this.qry_retornosBindingSource.Filter = string.Empty;
        }
        else
        {
            this.qry_retornosBindingSource.Filter = string.Format("Data >= '{0}' AND Data <= '{1}'", Convert.ToDateTime(textBoxDataIni.Text), Convert.ToDateTime(textBoxDataFin.Text));
        }
    }
    catch (Exception)
    {
    }
}