样例

做法【这个很简单，看一下就能懂】

代码

private void 添加标题ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            {             
                IGraphicsContainer graphicsContainer = mainPageLayoutControl1.PageLayout as IGraphicsContainer;
                IEnvelope envelope = new EnvelopeClass();    
                envelope.PutCoords(-14, 20, 35, 29);//上下左右
                IRgbColor pColor = new RgbColorClass()
                {
                    Red = 0,
                    Blue = 0,
                    Green = 0
                };
                IFontDisp pFont = new StdFont()
                {
                    Name = "宋体",
                    Bold = true
                } as IFontDisp;
                ITextSymbol pTextSymbol = new TextSymbolClass()
                {
                    Color = pColor,
                    Font = pFont,
                    Size = 30
                };
                ITextElement pTextElement = new TextElementClass()
                {
                    Symbol = pTextSymbol,
                    ScaleText = true,            
                    Text = DateTime.Now.ToString("yyyy年M月d日") + "重庆渝东南地区景点分布图"
                };
                IElement element = pTextElement as ESRI.ArcGIS.Carto.IElement;
                element.Geometry = envelope;
                graphicsContainer.AddElement(element, 0);
                mainPageLayoutControl1.Refresh();
            }
        }