在别人博客里看到的方法,就是在pageload里加上以下代码就行。
![](https://www.cnblogs.com/Images/OutliningIndicators/ContractedBlock.gif)
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
string beforeSubmitJS = "\nvar exportRequested = false; \n";
beforeSubmitJS += "var beforeFormSubmitFunction = theForm.onsubmit;\n";
beforeSubmitJS += "theForm.onsubmit = function(){ \n";
beforeSubmitJS += "var returnVal = beforeFormSubmitFunction(); \n";
beforeSubmitJS += "if(exportRequested && returnVal) {_spFormOnSubmitCalled=false; exportRequested=false;} \n";
beforeSubmitJS += "return returnVal; \n";
beforeSubmitJS += "}; \n";
this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alterFormSubmitEvent", beforeSubmitJS, true);
this._btnSubmit.Attributes["onclick"] = "javascript:exportRequested=true;";
想看到比较详细的可以点击这里
还有更更详细的可以点击这里