多个过滤器不起作用

问题描述

 私有  void  button1_Click(对象发​​件人，EventArgs e)
        {

            如果(ch1.Checked& ch2.Checked& ch3.Checked)
            {
                字符串过滤器= 字符串 .Format("  ACCentrala = \'" +(centrala.Text + "   \'"));
                过滤器+ = "  AND" ;
                过滤器+ = 字符串 .Format("  ACTelefon = \' " +(lokal.Text + "   \'"))；
                过滤器+ = "  AND" ;
                过滤器+ = 字符串 .Format("  ACPloca = \' " +(ploca.Text + "   \'"))；
                此 .istorijaBS.Filter =过滤器；
            }
        } 

我需要上面代码的帮助，我有三个文本框text1，text2和text3，三个复选框check1，check2和check3.当CHECK1检查text1为有源滤波器...等等.但是在这段代码中，当我检查所有3个文本框以进行全部3个文本框过滤时，它不起作用吗? "code-keyword">字符串 filter1 = 字符串 .Format(" ACCentrala = \"{0} \""，centrala.Text)；字符串 filter2 = 字符串 .Format(" ACTelefon = \"{0} \""，lokal.Text)；字符串 filter3 = 字符串 .Format(" ACPloca = \"{0} \""，ploca.Text)；字符串 filter = " " ;如果(已选中ch1){ filter = filter1;}如果(已选中ch2){ 如果(！string.IsNullOrEmpty(filter)) { 过滤器+ = " AND" ; } 过滤器+ = filter2;}如果(ch3.已选中){ 如果(！string.IsNullOrEmpty(filter)) { 过滤器+ = " AND" ; } 过滤器+ = filter3;}此 .istorijaBS.Filter =过滤器；

private void button1_Click(object sender, EventArgs e)
        {

            if (ch1.Checked && ch2.Checked && ch3.Checked)
            {
                string filter = string.Format("ACCentrala = \'" + (centrala.Text + "\'"));
                filter += " AND ";
                filter += string.Format("ACTelefon = \'" + (lokal.Text + "\'"));
                filter += " AND ";
                filter += string.Format("ACPloca = \'" + (ploca.Text + "\'"));
                this.istorijaBS.Filter = filter;
            }
        }

I need help with code above, I have three textboxes text1, text2 and text3, 3 checkboxes check1, check2 and check3. when check1 is checked text1 is active filter...and so on. but in this code when I check all 3 of them for filtering with all 3 textboxes it doesnt work?

解决方案

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