topic Re: error: no valid index range in Developers Questions

error: no valid index range

MariaMaldini — Fri, 23 Jan 2015 21:34:28 GMT

I am trying to add a new field and fill the field for some of rows but I face with the following error:

"The index passed was not within the valid range."

My simplified codes:

IMxDocument mxdoc = ArcMap.Application.Document as IMxDocument;

IMap map = mxdoc.FocusMap;

ILayer layer = map.Layer[0];

IFeatureLayer2 featureLayer = layer as IFeatureLayer2;

IFeatureClass flFeatureClass = featureLayer.FeatureClass;

IFeatureCursor featureCursor = flFeatureClass.Search(null, true);

IFeature feature2 = featureCursor.NextFeature();

IFieldEdit2 newField = new FieldClass();

newField.Name_2 = "name";

newField.Editable_2 = true;

newField.Type_2 = esriFieldType.esriFieldTypeString;

flFeatureClass.AddField(newField);

while (feature2 != null)

{

feature2.set_Value(flFeatureClass.FindField("name"), "rome");

feature2.Store();

feature2 = featureCursor.NextFeature();

}

When i used "breakpoint" to find the error line. i found out that

feature2.set_Value(flFeatureClass.FindField("name"), "rome");

is the line that causes the error (The index passed was not within the valid range).

I do not know what is wrong with set_value method. when i try to update a already created field, it work right but

when i want to create a new field and fill it with some data as mentioned codes , i encounter with the error.

Thanks in advance

Re: error: no valid index range

MariaMaldini — Sun, 25 Jan 2015 18:36:47 GMT

hello guys, there is not anyone who helps me? i could not find any helpful material about this problem on internet. please help me

Re: error: no valid index range

XanderBakker — Sun, 25 Jan 2015 20:01:43 GMT

You should first add the field and then start the cursor.

Re: error: no valid index range

MariaMaldini — Sun, 25 Jan 2015 20:42:06 GMT

if you look carefully you will find out that i created the field before populating it.

Re: error: no valid index range

MariaMaldini — Sun, 25 Jan 2015 20:45:23 GMT

guys my workspace is .shp file and i am using ArcGIS 10 with arcinfo license.

Re: error: no valid index range

XanderBakker — Sun, 25 Jan 2015 22:04:20 GMT

... and if you read my answer carefully, you would have noticed that I referred to adding the field before creating the cursor...

Re: error: no valid index range

XanderBakker — Sun, 25 Jan 2015 22:04:45 GMT

Your featureclass is a shapefile. Your workspace in that case is a folder.

Re: error: no valid index range

XanderBakker — Sun, 12 Dec 2021 03:15:15 GMT

Create the field: ArcObjects Help for .NET developers

Next use a cursor to update the content of the field: ArcObjects Help for .NET developers :

Make sure you determine the index of the field outside the loop (line 4), to avoid doing this for each feature.

// Use IFeatureClass.Update to populate IFeatureCursor.
IFeatureCursor updateCursor = featureClass.Update(queryFilter, false);

int typeFieldIndex = featureClass.FindField("name");
IFeature feature = null;
try
{
    while ((feature = updateCursor.NextFeature()) != null)
    {
        feature.set_Value(typeFieldIndex, "rome");
        updateCursor.UpdateFeature(feature);
    }
}
catch (COMException comExc)
{
    // Handle any errors that might occur on NextFeature().
}

// If the cursor is no longer needed, release it.
Marshal.ReleaseComObject(updateCursor);

Re: error: no valid index range

MariaMaldini — Mon, 26 Jan 2015 15:10:30 GMT

Thanks Xander for your attention,