CAD查找图上的文字（com接口）

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spFilte.AddStringEx("TEXT,MTEXT",5020);

[in] MCAD_McSelect Mode

构造选择集方式

[in] VARIANT point1

构造择择集时需要使用到的点对象

[in] VARIANT point2

构造择择集时需要使用到的点对象

[in,optional] VARIANT filterType

构造选择集的过滤数据的类型

[in,optional] VARIANT filterData

构造选择集的过滤数据

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      private void FineText()

        {

            // 创建选择集对象

            MxDrawSelectionSet ss = new MxDrawSelectionSet();

            // 创建过滤对象.

            MxDrawResbuf spFilte = new MxDrawResbuf();

            // 把文字对象，当着过滤条件.

            spFilte.AddStringEx("TEXT,MTEXT", 5020);

            // 得到图上，所有文字对象.

            ss.Select2(MCAD_McSelect.mcSelectionSetAll, null, null, null, spFilte);

            // 遍历每个文字.

            bool bFind = false;

   // 获得输入的文字

            string str = textBox1.Text;

            for (int i = 0; i < ss.Count; i++)

            {

                MxDrawEntity ent = ss.Item(i);

                if (ent == null)

                    continue;

                if (ent.ObjectName == "McDbText")

                {

                    // 是一个文字

                    MxDrawText text = (MxDrawText)ent;

                    string sTxt = text.TextString;

                    if (sTxt == str)

                    {

                        // 找到把文字放到视区中间.

                        axMxDrawX1.PutEntityInView(ent.ObjectID, 300);

                        var dLen = axMxDrawX1.ViewLongToDocCoord(80);

                        // 绘制一个标记圆.

                        axMxDrawX1.DrawVectorCircle(text.Position.x,

                        text.Position.y,

                        dLen, 65280);

                        bFind = true;

                    }

                }

                else if (ent.ObjectName == "McDbMText")

                {

                    // 找到一个多行文字

                    MxDrawResbuf param = new MxDrawResbuf();

                    param.AddObjectId(ent.ObjectID);

                    MxDrawMText mtext = (MxDrawMText)ent;

                    // 得到多行文字中的，文字内容.

                    MxDrawResbuf ret = (MxDrawResbuf)axMxDrawX1.CallEx("Mx_GetMTextContent", param);

                    if (ret.AtString(0) == "Ok")

                    {

                        if (ret.AtString(1) == str)

                        {

                            // 把文字放到视区.

                            axMxDrawX1.PutEntityInView(ent.ObjectID, 300);

                            var dLen = axMxDrawX1.ViewLongToDocCoord(80);

                            // 绘制一个标记圆.

                            axMxDrawX1.DrawVectorCircle(mtext.Location.x,

                                mtext.Location.y,

                                dLen, 65280);

                            bFind = true;

                            break;

                        }

                    }

                }

            }

            if (bFind)

                MessageBox.Show("找到文字");

            else

                MessageBox.Show("没有找到文字");

        }