how to select records from dataase using different search criteria.

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how to select records from dataase using different search criteria.

Posted 22-Jul-12 1:39am

abey e mathews

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woutercx · Accepted Answer · 2012-07-22T01:41:00

Solution 1

Like this?

LINQ and Dynamic Predicate Construction at Runtime[^]

I assume you're using LINQ to SQL since you're not giving any details.

Posted 22-Jul-12 1:41am

woutercx

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woutercx 22-Jul-12 11:30am

But like barneyman below says; If you're using it on the internet, it could be susceptible to sql injection attacks. Intranet would be fine.

Michael_Jacsi · Accepted Answer · 2012-07-22T01:54:00

Try to Build Your Query Like below 


string sql = "select * from tablname where 1=1";
        if (txtSearchRiskId.Text != "")
        {
            sql += "fRiskID ='" + txtSearchRiskId.Text + "' and ";
        }
        if (txtsearchrisksequenceno.Text != "")
        {
            sql += "fSerialNo like'%" + txtsearchrisksequenceno.Text + "%'and ";
        }
        if (txtsearchriskplateno.Text != "")
        {
            sql += "fPlateNo like'%" + txtsearchriskplateno.Text + "%' or fPlateNo_bl like'%" + txtsearchriskplateno.Text + "%'and ";
        }
        if (txtsearchriskyear.Text != "")
        {
            sql += "fYear like'%" + txtsearchriskyear.Text + "%'and ";
        }
        if (txtsearchriskchassisno.Text != "")
        {
            sql += "fChassisNo like'%" + txtsearchriskchassisno.Text + "%'and ";
        }
        if (txtsearchriskcustomid.Text != "")
        {
            sql += "fCustomID like'%" + txtsearchriskcustomid.Text + "%'and ";
        }
        if (ddlsearchRiskTypeCodevalue.SelectedIndex > 0)
        {
            sql += "fVehicleTypevalue like'%" + ddlsearchRiskTypeCodevalue.SelectedItem.Value + "%'and ";
        }
        if (ddlsearchRiskmakevalue.SelectedIndex > 0)
        {
            sql += "fMakevalue like'%" + ddlsearchRiskmakevalue.SelectedItem.Value + "%'and ";
        }
        if (ddlsearchRiskmodelvalue.SelectedIndex > 0)
        {
            sql += "fModelvalue like'%" + ddlsearchRiskmodelvalue.SelectedItem.Value + "%'";
        }