Merge pull request #270 from rentiansheng/valiationdata

data validation drop-down list use sqref cell  issue #268

datavalidation.go

@@ -119,6 +119,18 @@ func (dd *DataValidation) SetRange(f1, f2 int, t DataValidationType, o DataValid
 	return nil
 }
 
+// SetSqrefDropList data validation list with current sheet cell rang
+func (dd *DataValidation) SetSqrefDropList(sqref string, isCurrentSheet bool) error {
+	if isCurrentSheet {
+		dd.Formula1 = sqref
+		dd.Type = convDataValidationType(typeList)
+		return nil
+	}
+
+	//isCurrentSheet = false   Cross-sheet sqref cell use extLst xml node  unrealized
+	return fmt.Errorf("Cross-sheet sqref cell  are not supported")
+}
+
 // SetSqref provides function to set data validation range in drop list.
 func (dd *DataValidation) SetSqref(sqref string) {
 	if dd.Sqref == "" {

datavalidation_test.go

@@ -24,6 +24,14 @@ func TestDataValidation(t *testing.T) {
 	dvRange.SetDropList([]string{"1", "2", "3"})
 	xlsx.AddDataValidation("Sheet1", dvRange)
 
+	xlsx.SetCellStr("Sheet1", "E1", "E1")
+	xlsx.SetCellStr("Sheet1", "E2", "E2")
+	xlsx.SetCellStr("Sheet1", "E3", "E3")
+	dvRange = NewDataValidation(true)
+	dvRange.Sqref = "A7:B8"
+	dvRange.SetSqrefDropList("$E$1:$E$3", true)
+	xlsx.AddDataValidation("Sheet1", dvRange)
+
 	// Test write file to given path.
 	err := xlsx.SaveAs("./test/Book_data_validation.xlsx")
 	if err != nil {