//方法可以随意定义!!!!!!!!!! btnClear_Click(); private void btnClear_Click() { this.txtTitle.Text = ""; this.txtA.Text = ""; } protected void btnClear_Click(object sender, EventArgs e) { btnClear_Click(); } //相应地方调用该方法 //例: if (TextBox3.Text == "" || DropDownList1.Text == "" || DropDownList2.Text == "") { myMessageBox.show("请输入完整的信息", Page); btnClear_Click(); } else { }