自定义类似MessageBox小窗体操作

1、实际小窗体界面如下

2、代码如下

private void InputBox(string caption,string orderNo)

        {

            Form InputForm = new Form();

            InputForm.MinimizeBox = false;

            InputForm.MaximizeBox = false;

            InputForm.StartPosition = FormStartPosition.CenterScreen;

            InputForm.Width = ;

            InputForm.Height = ;

            InputForm.Text = "经营分析";

            InputForm.MaximizeBox = false;

            InputForm.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;

            TextBox tbE = new TextBox();

            tbE.Left = ;

            tbE.Top =;

            tbE.Width = ;

            tbE.Height = ;

            tbE.Multiline = true;

            tbE.Parent = InputForm;

            tbE.Text =caption;

            tbE.SelectAll();

            Label lab = new Label();

            lab.Left = ;

            lab.Top = ;

            lab.Height = ;

            lab.Width = ;

            lab.Parent = InputForm;

            lab.Text = "（提示，输入的内容限定为500个字符以内！）";

            Button btnok = new Button();

            btnok.Left =;

            btnok.Top = ;

            btnok.Parent = InputForm;

            btnok.Text = "确定";

            InputForm.AcceptButton = btnok;//回车响应

            btnok.DialogResult = DialogResult.OK;

            Button btncancal = new Button();

            btncancal.Left = ;

            btncancal.Top = ;

            btncancal.Parent = InputForm;

            btncancal.Text = "取消";

            btncancal.DialogResult = DialogResult.Cancel;

            try

            {

                if (InputForm.ShowDialog() == DialogResult.OK)

                {

                    if (tbE.Text.Trim().Length > ) {

                        MessageBox.Show("输入的字符长度，最大不能超过         500！","温馨提示");

                        return;

                    }

                    if (String.Compare(caption, tbE.Text.Trim(), true) != )

                    {

                        StringBuilder strWhere = new StringBuilder();

                        string mebo = tbE.Text.Trim().Length >  ? tbE.Text.Trim().Substring(, ) + "...." : tbE.Text.Trim();

                        strWhere.AppendFormat(@" UPDATE TA_CurrencyQueryEx_Exception SET YCRemark=N'{0}', UpdateBy='{1}', UpdateDT='{2}'

                WHERE OrderNo='{3}' ", tbE.Text.Trim(), SessionAuth.UserID, DateTime.Now, orderNo);

                       WinSrv.ExecuteNonQuery(strWhere.ToString(), new Object[] { });

                       txt_Col424.Text = SessionAuth.UserName;

                       txt_Col425.Text = DateTime.Now.ToString();

                       txt_Col423.Text = mebo;

                       string logInfo = "运单号 " + orderNo + "的督察分析信息，被" + SessionAuth.UserName+"修改";

                       ClsDatabase.gSetSystemLog("经营分析", logInfo, "督察分析");

                    }

                }

            }

            finally

            {

                InputForm.Dispose();

            }

        }