创建一个搜索按钮 [英] creating a search button

问题描述

我正在尝试在表单上创建一个搜索按钮，该按钮将comboBox中的值用作主键.但是我收到错误消息，无法从"System.Windows.Forms.ComboBox"转换为"string".我该怎么办
在班上我有这个

Am trying to create a search button on my form which uses values from a comboBox as its primary key. but i get the error message cannot convert from ''System.Windows.Forms.ComboBox'' to ''string''. What should i do
In the class I have this

public bool searchstaffsalarypaymentDetails(string salaryid, string salarypurpose, string salaryyears, string salarymonths)
        {
            SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["ConnectionString"]);

表格后面有这个

Behind the form I have this

private void lklSearch5_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            try
            {
                clsStaffsalarypayment person5 = new clsStaffsalarypayment();

                if (person5.searchstaffsalarypaymentDetails(cboStaffid5, cboPurpose, cboMonth, cboYear))
                {
                    var
                    _with5 = this;
                    _with5.cboStaffid5.Text = person5.ID5.ToString();

推荐答案

由于您没有将ComboBox值用于searchstaffsalarypaymentDetails，因此出现错误消息方法，但ComboBox本身.
也许您应该将其重写为:

The error message occurs since you are not using the ComboBox value for the searchstaffsalarypaymentDetails method, but the ComboBox itself.
Maybe you should rewrite it as:

person5.searchstaffsalarypaymentDetails(cboStaffid5.SelectedItem.ToString(), cboPurpose.SelectedItem.ToString(), cboMonth.SelectedItem.ToString(), cboYear.SelectedItem.ToString()))

这篇关于创建一个搜索按钮的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！