string strConn = "Provider=Microsoft.Ace.OLEDB.12.0;Data Source=" + filename + ";Extended Properties=\"Excel 12.0 Xml;HDR=Yes;IMEX=1\";";
I search on google, and got no results. I think the default value is 2, but I am not sure.
Anyone can help me? Thanks.
Per the article below, IMEX values of 0 and 2 do the same thing; they use ImportMixedTypes=MajorityType. That is the default if you don't specify IMEX=1 in your extended properties.
So the default IMEX behavior is MajorityType, and this can be overridden by using IMEX=1 in your connection string along with the registry setting ImportMixedTypes=Text.