如何从Excel ListObject表填充数据表

Question

My main problem is getting the information from my list object in the excel spreadsheet. For some reason it wont convert the string to int see where I have commented. Any help would be greatly appreciated.

public static DataTable excelDerivedAssembliesDT(string excelDir, int jobID)
{

 DataTable dt = new DataTable();
 var excelApp = new Excel.Application();

 try
 {
 excelApp.Visible = false;
 excelApp.Workbooks.Open(excelDir);
 Excel.ListObject vstoListObject = excelApp.Worksheets[1].ListObjects[1];

　DataColumn assemblyID = new DataColumn();
 assemblyID.DataType = System.Type.GetType("System.Int32");
 assemblyID.ColumnName = "assemblyID";
 assemblyID.AutoIncrement = true;
dt.Columns.Add(assemblyID);

DataColumn assemblyNo = new DataColumn();
 assemblyNo.DataType = System.Type.GetType("System.Int32");
 assemblyNo.ColumnName = "assemblyNo";
dt.Columns.Add(assemblyNo);

 DataColumn job = new DataColumn();
 job.DataType = System.Type.GetType("System.Int32");
 job.ColumnName = "jobID";
dt.Columns.Add(job);

 DataColumn assemQTY = new DataColumn();
 assemQTY.DataType = System.Type.GetType("System.Int32");
 assemQTY.ColumnName = "assemblyQty";
dt.Columns.Add(assemQTY);
 DataRow dataRow = dt.NewRow();
　
　　
 foreach (Excel.ListRow row in vstoListObject.ListRows)
{
　//This is the part i cant seem to get to work i just cant see why it shouldn't
　
 dataRow["assemblyNo"] = (int)(row.Range.Cells[1, 1]).ToString());

 dataRow["assemblyQty"] = (int)(row.Range.Cells[1, 2]).ToString());

 dataRow["jobID"] = (int)(row.Range.Cells[1, 3]).ToString());

dt.Rows.Add(dataRow);
dataRow = dt.NewRow();


}

dt.AcceptChanges();

}

 catch(exception e)
 {
     MessageBox.Show(e.ToString());

 }
 return dt;

}
　
　

Thanks in advance.

Answer 1

You are trying to cast a string into an integer, which will raise an exception. You should use

int.Parse((row.Range.Cells[1, 1]).ToString())