c#依参数自动生成控件

　　很多系统都带有自定义报表的功能，而此功能都需依参数自动生成控件，举例如下：

　　

　　如上图，一条查询语句当中，包含了3个参数，其中两个是日期型(使用:date!进行标识)，一个是字符型(使用:进行标识)，要生成的效果图如下所示：

　　

　　代码如下：

private void frmdefine_myeventclose(string strid, string strname, string strsql)
{
    //值传递
    returnid = strid;
    returnname = strname;
    returnsql = strsql;
    //空格清除
    while (returnsql.indexof(": ") != -1)
    {
        returnsql = returnsql.replace(": ", ":");
    }
    while (returnsql.indexof(":date! ") != -1)
    {
        returnsql = returnsql.replace(":date! ", ":date!");
    }
    //产生标题
    rtxtname.text = "[" + strid + "]" + strname;
    rtxtname.selectionalignment = system.windows.forms.horizontalalignment.center;
    //清除控件
    splitcontainer2.panel1.controls.clear();
    //添加控件
    if (strsql.indexof(":") != -1)
    {
        int paramindex = 100;   //参数序号，从100往前倒数。
        paramsql = string.empty;
        list<string> list = new list<string>(returnsql.split(' '));
        for (int i = list.count - 1; i > -1; i--)
        {
            if (list[i].indexof(":") == -1)
            {
                paramsql = list[i] + " " + paramsql;
                list.removeat(i);
            }
            else
            {
                if (list[i].indexof(":date!") != -1)
                {
                    if (list[i].indexof(":date!") == 0)
                    {
                        paramsql = "params[" + paramindex.tostring() + "] " + paramsql;
                        paramindex--;
                    }
                    else
                    {
                        paramsql = list[i].substring(0, list[i].indexof(":date!")) + "params[" + paramindex.tostring() + "] " + paramsql;
                        paramindex--;
                    }
                }
                else
                {
                    if (list[i].indexof(":") == 0)
                    {
                        paramsql = "params[" + paramindex.tostring() + "] " + paramsql;
                        paramindex--;
                    }
                    else
                    {
                        paramsql = list[i].substring(0, list[i].indexof(":")) + "params[" + paramindex.tostring() + "] " + paramsql;
                        paramindex--;
                    }
                }
            }
        }
        //添加控件
        if (list.count > 0)
        {
            //坐标初始化
            point point = new point(6, 6);
            //控件行数
            int introw = 0;
            //以6个参数为一行，初始化控件面板的高度。
            splitcontainer2.splitterdistance = 25 * convert.toint32(math.ceiling(list.count / 6.0));
            //控件添加
            paramindex = 100 - list.count + 1;
            for (int i = 0; i < list.count; i++)
            {
                string strlabeltext = string.empty;
                if (i % 6 == 0 && i != 0)
                {
                    introw++;
                    point.x = 6;
                    point.y = 6 + 25 * introw;
                }
                //日期及文本
                if (list[i].indexof(":date!") != -1)
                {
                    //label
                    strlabeltext = list[i].substring(list[i].indexof(":date!") + 6, list[i].length - list[i].indexof(":date!") - 6);
                    label label = new label();
                    label.name = "label" + i.tostring();
                    label.text = strlabeltext;
                    label.autosize = true;
                    label.location = point;
                    splitcontainer2.panel1.controls.add(label);
                    //datetimepicker
                    datetimepicker datetimepicker = new datetimepicker();
                    datetimepicker.name = "params[" + paramindex.tostring() + "]";
                    datetimepicker.format = datetimepickerformat.custom;
                    datetimepicker.customformat = "yyyy-mm-dd";
                    datetimepicker.width = 100;
                    point.x = point.x + label.width + 4;
                    point.y = label.location.y - 4;
                    datetimepicker.location = point;
                    splitcontainer2.panel1.controls.add(datetimepicker);
                    //坐标初始化
                    point.x += 112;
                    point.y = label.location.y;
                }
                else
                {
                    //label
                    strlabeltext = list[i].substring(list[i].indexof(":") + 1, list[i].length - list[i].indexof(":") - 1);
                    label label = new label();
                    label.name = "label" + i.tostring();
                    label.text = strlabeltext;
                    label.autosize = true;
                    label.location = point;
                    splitcontainer2.panel1.controls.add(label);
                    //textbox
                    textbox textbox = new textbox();
                    textbox.name = "params[" + paramindex.tostring() + "]";
                    textbox.text = string.empty;
                    textbox.width = 100;
                    point.x = point.x + label.width + 4;
                    point.y = label.location.y - 4;
                    textbox.location = point;
                    splitcontainer2.panel1.controls.add(textbox);
                    //坐标初始化
                    point.x += 112;
                    point.y = label.location.y;
                }
                //参数序号赋值
                paramindex++;
            }
        }
    }
    //数据源初始化
    datagridview1.datasource = null;
}

　　好了，分享就到这里，希望对大家有一些帮助。